Formerly known as "Read It Later", it's a reading list service. You save pages for later reference. There's subscriptions to unlock features.
I loved RIL but Pocket is but a shadow of what it once was.
Similar to Evernote web clips, or Instapaper. I now use OneNote instead with the webclipper plugin, mostly because it puts the clips in a place where I can also add my own notes.
I switched to Joplin. It's completely seamless once I authenticate with the service I sync with and toggle the web clipper support in the desktop app. You can even clip those pages where the site blocks the Evernote and OneNote crawler since it all happens in your browser and on the local clip server.
Best of all, it's all in Markdown. There's a beta rich text editor, but the Markdown editor has a preview and a little button bar for common stuff like lists and formatting.