One feature of Telegram I really loved is called “Saved Messages”. It’s akin to a chat where you are the only participant.
If I find an interesting link, or a cool photo, or find a quote I want to save for later, I’ll just dump it into the chat, and can retrieve it from all my devices later on.
Of course I could also do that with files, but managing files from my Android is not great. However I can just open the Telegram app, go to this conversation, etc. It works great with the “share” button on mobile.