The Collections feature that is already present in Microsoft Edge on Windows, is now available on Android (currently rolling out) as well and allows you to create, access, and sync your Collections across your devices.
The Collections feature launched in Microsoft Edge by Microsoft can be used as a research tool. You can gather links, images, and information from websites and form a group. The feature initially introduced in Edge Insider channels as an experiment behind a flag.
Collections is being constantly improved by the Microsoft Edge team. The stable version released yesterday added some improvements to the feature and Edge Canary has integrated Pinterest Support. Currently, users allowed to export Collections in Edge to Word, Excel, Pinterest, with Send to Microsoft OneNote support coming soon.
Back in March, Microsoft confirmed Collections will come to mobile in Spring later this year. The feature is now rolling out via server-side to Edge on Android and you need to be on version 45.04.24.4994 to see it.

Create new Collections in Edge on Android
1. Launch Edge on Android
2. Tap on the menu icon to open the Edge menu to notice the “Collections” button at the top row with the “Add to Collection” option below it
3. To create a new Collection, select Collections.
4. The Hub from Classic Edge appears on top with the Collections icon at the end. Select + icon, type a name for the new Collection and select Create.
5. Now visit websites and use the “Add to collections” option in the menu to add content to Collections you created or select + icon to keep adding images or web pages to the current Collection you’re working on.
For every collection, you’ll be offered options to Rename, Reorder, and Delete a Collection.
To access Collections on all signed-in devices, Edge itself asks to enable Sync for Collections, you need to select “Sync now”. Or anytime visit Settings, tap on your email address> Sync >Sync Settings, and select Collections.

If you can’t wait to try out, grab Edge APK from here and install it on your device. You need to restart your device to see the Collections options in the Edge menu.
Related articles:
Microsoft Edge Canary Adds support for Pinterest to Collections
Microsoft brings Collections feature to Edge Canary