diff --git a/common/util/parse.ts b/common/util/parse.ts
index 30dcb952..cdaa6a6c 100644
--- a/common/util/parse.ts
+++ b/common/util/parse.ts
@@ -20,6 +20,7 @@ import { Text } from '@tiptap/extension-text'
 // other tiptap extensions
 import { Image } from '@tiptap/extension-image'
 import { Link } from '@tiptap/extension-link'
+import Iframe from './tiptap-iframe'
 
 export function parseTags(text: string) {
   const regex = /(?:^|\s)(?:[#][a-z0-9_]+)/gi
@@ -80,6 +81,7 @@ export const exhibitExts = [
 
   Image,
   Link,
+  Iframe,
 ]
 // export const exhibitExts = [StarterKit as unknown as Extension, Image]
 
diff --git a/common/util/tiptap-iframe.ts b/common/util/tiptap-iframe.ts
new file mode 100644
index 00000000..5af63d2f
--- /dev/null
+++ b/common/util/tiptap-iframe.ts
@@ -0,0 +1,92 @@
+// Adopted from https://github.com/ueberdosis/tiptap/blob/main/demos/src/Experiments/Embeds/Vue/iframe.ts
+
+import { Node } from '@tiptap/core'
+
+export interface IframeOptions {
+  allowFullscreen: boolean
+  HTMLAttributes: {
+    [key: string]: any
+  }
+}
+
+declare module '@tiptap/core' {
+  interface Commands<ReturnType> {
+    iframe: {
+      setIframe: (options: { src: string }) => ReturnType
+    }
+  }
+}
+
+// These classes style the outer wrapper and the inner iframe;
+// Adopted from css in https://github.com/ueberdosis/tiptap/blob/main/demos/src/Experiments/Embeds/Vue/index.vue
+const wrapperClasses = 'relative h-auto w-full overflow-hidden'
+const iframeClasses = 'absolute top-0 left-0 h-full w-full'
+
+export default Node.create<IframeOptions>({
+  name: 'iframe',
+
+  group: 'block',
+
+  atom: true,
+
+  addOptions() {
+    return {
+      allowFullscreen: true,
+      HTMLAttributes: {
+        class: 'iframe-wrapper' + ' ' + wrapperClasses,
+        // Tailwind JIT doesn't seem to pick up `pb-[20rem]`, so we hack this in:
+        style: 'padding-bottom: 20rem;',
+      },
+    }
+  },
+
+  addAttributes() {
+    return {
+      src: {
+        default: null,
+      },
+      frameborder: {
+        default: 0,
+      },
+      allowfullscreen: {
+        default: this.options.allowFullscreen,
+        parseHTML: () => this.options.allowFullscreen,
+      },
+    }
+  },
+
+  parseHTML() {
+    return [{ tag: 'iframe' }]
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return [
+      'div',
+      this.options.HTMLAttributes,
+      [
+        'iframe',
+        {
+          ...HTMLAttributes,
+          class: HTMLAttributes.class + ' ' + iframeClasses,
+        },
+      ],
+    ]
+  },
+
+  addCommands() {
+    return {
+      setIframe:
+        (options: { src: string }) =>
+        ({ tr, dispatch }) => {
+          const { selection } = tr
+          const node = this.type.create(options)
+
+          if (dispatch) {
+            tr.replaceRangeWith(selection.from, selection.to, node)
+          }
+
+          return true
+        },
+    }
+  },
+})
diff --git a/functions/src/scripts/convert-categories.ts b/functions/src/scripts/convert-categories.ts
index 7b291202..d559bf92 100644
--- a/functions/src/scripts/convert-categories.ts
+++ b/functions/src/scripts/convert-categories.ts
@@ -17,6 +17,7 @@ initAdmin()
 
 const adminFirestore = admin.firestore()
 
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 const addGroupIdToContracts = async () => {
   const groups = await getValues<Group>(adminFirestore.collection('groups'))
   const contracts = await getValues<Contract>(
diff --git a/web/components/contract-search.tsx b/web/components/contract-search.tsx
index 8eb7df6e..fca1b272 100644
--- a/web/components/contract-search.tsx
+++ b/web/components/contract-search.tsx
@@ -39,11 +39,12 @@ const indexPrefix = ENV === 'DEV' ? 'dev-' : ''
 
 const sortIndexes = [
   { label: 'Newest', value: indexPrefix + 'contracts-newest' },
-  { label: 'Oldest', value: indexPrefix + 'contracts-oldest' },
+  // { label: 'Oldest', value: indexPrefix + 'contracts-oldest' },
   { label: 'Most popular', value: indexPrefix + 'contracts-score' },
   { label: 'Most traded', value: indexPrefix + 'contracts-most-traded' },
   { label: '24h volume', value: indexPrefix + 'contracts-24-hour-vol' },
   { label: 'Last updated', value: indexPrefix + 'contracts-last-updated' },
+  { label: 'Subsidy', value: indexPrefix + 'contracts-liquidity' },
   { label: 'Close date', value: indexPrefix + 'contracts-close-date' },
   { label: 'Resolve date', value: indexPrefix + 'contracts-resolve-date' },
 ]
diff --git a/web/components/contract/contract-leaderboard.tsx b/web/components/contract/contract-leaderboard.tsx
index 0623b6d7..deb9b857 100644
--- a/web/components/contract/contract-leaderboard.tsx
+++ b/web/components/contract/contract-leaderboard.tsx
@@ -49,7 +49,7 @@ export function ContractLeaderboard(props: {
 
   return users && users.length > 0 ? (
     <Leaderboard
-      title="🏅 Top bettors"
+      title="🏅 Top traders"
       users={users || []}
       columns={[
         {
diff --git a/web/components/editor.tsx b/web/components/editor.tsx
index 7063fa42..d64dcc78 100644
--- a/web/components/editor.tsx
+++ b/web/components/editor.tsx
@@ -19,6 +19,7 @@ import { useMutation } from 'react-query'
 import { exhibitExts } from 'common/util/parse'
 import { FileUploadButton } from './file-upload-button'
 import { linkClass } from './site-link'
+import Iframe from 'common/util/tiptap-iframe'
 
 const proseClass = clsx(
   'prose prose-p:my-0 prose-li:my-0 prose-blockquote:not-italic max-w-none prose-quoteless leading-relaxed',
@@ -56,6 +57,7 @@ export function useTextEditor(props: {
           class: clsx('no-underline !text-indigo-700', linkClass),
         },
       }),
+      Iframe,
     ],
     content: defaultValue,
   })
@@ -69,12 +71,20 @@ export function useTextEditor(props: {
           (file) => file.type.startsWith('image')
         )
 
-        if (!imageFiles.length) {
-          return // if no files pasted, use default paste handler
+        if (imageFiles.length) {
+          event.preventDefault()
+          upload.mutate(imageFiles)
         }
 
-        event.preventDefault()
-        upload.mutate(imageFiles)
+        // If the pasted content is iframe code, directly inject it
+        const text = event.clipboardData?.getData('text/plain').trim() ?? ''
+        const isValidIframe = /^<iframe.*<\/iframe>$/.test(text)
+        if (isValidIframe) {
+          editor.chain().insertContent(text).run()
+          return true // Prevent the code from getting pasted as text
+        }
+
+        return // Otherwise, use default paste handler
       },
     },
   })
diff --git a/web/pages/charity/[charitySlug].tsx b/web/pages/charity/[charitySlug].tsx
index 00a7c625..acf97d1b 100644
--- a/web/pages/charity/[charitySlug].tsx
+++ b/web/pages/charity/[charitySlug].tsx
@@ -1,6 +1,9 @@
 import { sortBy, sumBy, uniqBy } from 'lodash'
 import clsx from 'clsx'
 import React, { useEffect, useRef, useState } from 'react'
+import Image from 'next/image'
+import Confetti from 'react-confetti'
+
 import { Col } from 'web/components/layout/col'
 import { Row } from 'web/components/layout/row'
 import { Page } from 'web/components/page'
@@ -16,11 +19,11 @@ import { useRouter } from 'next/router'
 import Custom404 from '../404'
 import { useCharityTxns } from 'web/hooks/use-charity-txns'
 import { useWindowSize } from 'web/hooks/use-window-size'
-import Confetti from 'react-confetti'
 import { Donation } from 'web/components/charity/feed-items'
 import Image from 'next/image'
-import { manaToUSD } from 'common/util/format'
+import { manaToUSD } from 'common/util/format'>>>>>>> main
 import { track } from 'web/lib/service/analytics'
+import { SEO } from 'web/components/SEO'
 
 export default function CharityPageWrapper() {
   const router = useRouter()
@@ -63,6 +66,11 @@ function CharityPage(props: { charity: Charity }) {
         />
       }
     >
+      <SEO
+        title={name}
+        description={description}
+        url="/groups"
+      />
       {showConfetti && (
         <Confetti
           width={width ? width : 500}
diff --git a/web/pages/charity/index.tsx b/web/pages/charity/index.tsx
index b1cfc353..80003c81 100644
--- a/web/pages/charity/index.tsx
+++ b/web/pages/charity/index.tsx
@@ -23,6 +23,7 @@ import { searchInAny } from 'common/util/parse'
 import { getUser } from 'web/lib/firebase/users'
 import { SiteLink } from 'web/components/site-link'
 import { User } from 'common/user'
+import { SEO } from 'web/components/SEO'
 
 export async function getStaticProps() {
   const txns = await getAllCharityTxns()
@@ -114,6 +115,11 @@ export default function Charity(props: {
 
   return (
     <Page>
+      <SEO
+        title="Manifold for Charity"
+        description="Donate your prediction market earnings to charity on Manifold."
+        url="/charity"
+      />
       <Col className="w-full rounded px-4 py-6 sm:px-8 xl:w-[125%]">
         <Col className="">
           <Title className="!mt-0" text="Manifold for Charity" />
@@ -128,6 +134,9 @@ export default function Charity(props: {
             </SiteLink>
             !
           </span> */}
+          <span className="text-gray-600">
+            Convert your M$ earnings into real charitable donations.
+          </span>
           <DonatedStats
             stats={[
               {
diff --git a/web/pages/create.tsx b/web/pages/create.tsx
index bfea2dfc..9fa340f5 100644
--- a/web/pages/create.tsx
+++ b/web/pages/create.tsx
@@ -30,6 +30,7 @@ import { TextEditor, useTextEditor } from 'web/components/editor'
 import { Checkbox } from 'web/components/checkbox'
 import { redirectIfLoggedOut } from 'web/lib/firebase/server-auth'
 import { Title } from 'web/components/title'
+import { SEO } from 'web/components/SEO'
 
 export const getServerSideProps = redirectIfLoggedOut('/')
 
@@ -63,6 +64,11 @@ export default function Create() {
 
   return (
     <Page>
+      <SEO
+        title="Create a market"
+        description="Create a play-money prediction market on any question."
+        url="/create"
+      />
       <div className="mx-auto w-full max-w-2xl">
         <div className="rounded-lg px-6 py-4 sm:py-0">
           <Title className="!mt-0" text="Create a market" />
diff --git a/web/pages/group/[...slugs]/index.tsx b/web/pages/group/[...slugs]/index.tsx
index 06f043e7..c27d998e 100644
--- a/web/pages/group/[...slugs]/index.tsx
+++ b/web/pages/group/[...slugs]/index.tsx
@@ -492,7 +492,7 @@ function GroupLeaderboards(props: {
             <SortedLeaderboard
               users={members}
               scoreFunction={(user) => traderScores[user.id] ?? 0}
-              title="🏅 Top bettors"
+              title="🏅 Top traders"
               header="Profit"
               maxToShow={maxToShow}
             />
@@ -508,7 +508,7 @@ function GroupLeaderboards(props: {
           <>
             <Leaderboard
               className="max-w-xl"
-              title="🏅 Top bettors"
+              title="🏅 Top traders"
               users={topTraders}
               columns={[
                 {
diff --git a/web/pages/groups.tsx b/web/pages/groups.tsx
index c87f801b..d1eed970 100644
--- a/web/pages/groups.tsx
+++ b/web/pages/groups.tsx
@@ -18,6 +18,7 @@ import { Avatar } from 'web/components/avatar'
 import { JoinOrLeaveGroupButton } from 'web/components/groups/groups-button'
 import { UserLink } from 'web/components/user-page'
 import { searchInAny } from 'common/util/parse'
+import { SEO } from 'web/components/SEO'
 
 export async function getStaticProps() {
   const groups = await listAllGroups().catch((_) => [])
@@ -100,6 +101,11 @@ export default function Groups(props: {
 
   return (
     <Page>
+      <SEO
+        title="Groups"
+        description="Manifold Groups are communities centered around a collection of prediction markets. Discuss and compete on questions with your friends."
+        url="/groups"
+      />
       <Col className="items-center">
         <Col className="w-full max-w-2xl px-4 sm:px-2">
           <Row className="items-center justify-between">
diff --git a/web/pages/index.tsx b/web/pages/index.tsx
index c7e81d97..473189aa 100644
--- a/web/pages/index.tsx
+++ b/web/pages/index.tsx
@@ -5,6 +5,7 @@ import { Col } from 'web/components/layout/col'
 import { ManifoldLogo } from 'web/components/nav/manifold-logo'
 import { redirectIfLoggedIn } from 'web/lib/firebase/server-auth'
 import { useSaveReferral } from 'web/hooks/use-save-referral'
+import { SEO } from 'web/components/SEO'
 
 export const getServerSideProps = redirectIfLoggedIn('/home', async (_) => {
   // These hardcoded markets will be shown in the frontpage for signed-out users:
@@ -30,6 +31,11 @@ export default function Home(props: { hotContracts: Contract[] }) {
 
   return (
     <Page>
+      <SEO
+        title="Manifold Markets"
+        description="Create a play-money prediction market on any topic you care about
+            and bet with your friends on what will happen!"
+      />
       <div className="px-4 pt-2 md:mt-0 lg:hidden">
         <ManifoldLogo />
       </div>
diff --git a/web/pages/leaderboards.tsx b/web/pages/leaderboards.tsx
index 7ee13172..45c484c4 100644
--- a/web/pages/leaderboards.tsx
+++ b/web/pages/leaderboards.tsx
@@ -13,6 +13,7 @@ import { useEffect, useState } from 'react'
 import { Title } from 'web/components/title'
 import { Tabs } from 'web/components/layout/tabs'
 import { useTracking } from 'web/hooks/use-tracking'
+import { SEO } from 'web/components/SEO'
 
 export async function getStaticProps() {
   const props = await fetchProps()
@@ -78,7 +79,7 @@ export default function Leaderboards(_props: {
       <>
         <Col className="mx-4 items-center gap-10 lg:flex-row">
           <Leaderboard
-            title="🏅 Top bettors"
+            title="🏅 Top traders"
             users={topTraders}
             columns={[
               {
@@ -123,6 +124,11 @@ export default function Leaderboards(_props: {
 
   return (
     <Page>
+      <SEO
+        title="Leaderboards"
+        description="Manifold's leaderboards show the top traders and market creators."
+        url="/leaderboards"
+      />
       <Title text={'Leaderboards'} className={'hidden md:block'} />
       <Tabs
         currentPageForAnalytics={'leaderboards'}
diff --git a/web/pages/markets.tsx b/web/pages/markets.tsx
index a3e851fc..2d3346c1 100644
--- a/web/pages/markets.tsx
+++ b/web/pages/markets.tsx
@@ -8,7 +8,7 @@ export default function Markets() {
     <Page>
       <SEO
         title="Explore"
-        description="Discover what's new, trending, or soon-to-close. Or search among our hundreds of markets."
+        description="Discover what's new, trending, or soon-to-close. Or search thousands of prediction markets."
         url="/markets"
       />
       <ContractSearch />
diff --git a/web/pages/notifications.tsx b/web/pages/notifications.tsx
index 3db345ef..72754d32 100644
--- a/web/pages/notifications.tsx
+++ b/web/pages/notifications.tsx
@@ -391,7 +391,7 @@ function IncomeNotificationItem(props: {
       reasonText = !simple
         ? `Bonus for ${
             parseInt(sourceText) / UNIQUE_BETTOR_BONUS_AMOUNT
-          } unique bettors`
+          } unique traders`
         : 'bonus on'
     } else if (sourceType === 'tip') {
       reasonText = !simple ? `tipped you` : `in tips on`
diff --git a/web/pages/referrals.tsx b/web/pages/referrals.tsx
index c879afaa..f50c2e2b 100644
--- a/web/pages/referrals.tsx
+++ b/web/pages/referrals.tsx
@@ -21,7 +21,12 @@ export default function ReferralsPage() {
 
   return (
     <Page>
-      <SEO title="Referrals" description="" url="/add-funds" />
+      <SEO
+        title="Referrals"
+        description={`Manifold's referral program. Invite new users to Manifold and get M${REFERRAL_AMOUNT} if they
+            sign up!`}
+        url="/referrals"
+      />
 
       <Col className="items-center">
         <Col className="h-full rounded bg-white p-4 py-8 sm:p-8 sm:shadow-md">