mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

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I got to use Instagram on my
fiancée's phone for the first time and honestly I'm impressed that so many people use... that.

Stefan Scholl

@Gargron the most simple things can only get solved by googling for it. Try finding the posts you have liked.
The content is bland and the app is a UX nightmare.