ok so, for example, I like a project and I click on collection and I puted in my collection. Why could I do that and what happens next?
Viewing post in What are collections?
It is a tool to organize projects that interest you, read this:
https://itch.io/blog/30876/itchio-collections-are-great-and-you-should-use-them
Then you can find that game page more easily next time, if you want to play it again (or if you want to check for updates, or give feedback).
You can also create public collections, to show your followers and possibly others what the good games here are (I have three such collections, you can find them on my creator page).
itch.io (most likely) also uses collections to determine the games that should be at the top of their recommendation lists, or on the front page, but the details behind their recommendation system are a secret (for a good reason).
In 99% of the cases, yes. Just be happy and proud if your game is put into collections.
However you can use collections for anything, and I have seen people use it for instance to keep track of malware: https://itch.io/t/3512426/itch-is-not-a-safe-place-do-not-download-things
They do. But they need you to help. (insert that picture of that bear that want's you to help prevent wildfires).
If you come across suspicious projects, hit that report button on the bottom. And tell them why it is suspicous, like provide a link to the original in case of a stolen game.
What they desparetly need to improve is their hacked account detection. 2fa will not protect against cookie theft. And there do be technical stuff to detect hacked accounts, even if the tokens are valid.
Think of it as a bookmark. People use them to manage their favorites or as a watchlist, or as a reminder that they already have visited that project. Or any other thing you can do with bookmarks.
Best case is, that you find yourself on a public collection with a descriptive name. Then you know the intention.