docs: add share extension help guide

docs/help/contents/mobile-integration/README.md

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+# Mobile integration

docs/help/contents/mobile-integration/home-widgets.md

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+# Home screen widgets

docs/help/contents/mobile-integration/pin-to-notifications.md

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+# Pin to notifications (android)

docs/help/contents/mobile-integration/quick-note-notification.md

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+# Quick notes from notifications (android)

docs/help/contents/mobile-integration/share-extensions.md

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+# Share extensions
+
+Basic web clipping support is available on both android & ios apps via share extensions.
+
+We are going to use browser app as an example to demonstarte how you can clip information from webpages and other apps on your iPhone.
+
+1. Select some text on a webpage then Tap on "Share" on the context menu.
+
+# [iOS](#/tab/ios)
+
+![Clip selection](/static/mobile-integration/clip-selection-ios.png)
+
+# [Android](#/tab/android)
+
+![Clip selection](/static/mobile-integration/clip-selection-android.png)
+
+---
+
+2. Select Notesbook from the list of apps.
+
+# [iOS](#/tab/ios)
+
+![Select Notesnook](/static/mobile-integration/select-notesnook-ios.png)
+
+# [Android](#/tab/android)
+
+![Select Notesnook](/static/mobile-integration/select-notesnook-android.png)
+
+---
+
+
+
+3. Tap on the Save button on bottom right corner to save the web clip. This will save the web clip as a new note in Notesnook.
+
+![Save web clip](/static/mobile-integration/save-clip-ios.png)
+
+## Append to note
+
+1. Tap on Append to note on the Share extension
+2. Search for a note to append the web clip to and select it
+3. Save the web clip.
+
+> info
+>
+> Share exenstion will save the note you selected so in future web clips, it will be selected by default until you reset it.
+
+## Clipping full webpage content
+1. Share the webpage link to Notesnook share extension
+2. Select "Web clip" on bottom left corner
+
+![clip-webpage](/static/mobile-integration/clip-webpage.png)
+
+3. Save the web clip.
+
+