INTRO TO FEDERATION 2:

1. Servers (instances) mostly communicate 2 ways: sending posts to each other & sending profiles to each other

2. When person A's profile is first sent over, it only has their name, avatar & bio*

3. When someone on your server Y follows A, their server will send Y their toots & these are A's only toots that Y knows about*

4. # of toots/followers/follows on A's profile on Y all refer to the # of t/f/f which are actually on Y directly or indirectly

*simplified 4 brevity