Facebook and Unity, how are the methods different?

Question

Facebook

Hello everyone, help me figure out the Facebook Api.
What mandatory FB functions (share, etc.) should be implemented in the game?
I also do not quite understand what each method is responsible for.
For example FB.AppRequest for inviting a friend to try the game.
And what are FB.FeedShare and FB.ShareLink responsible for and how do they differ?

Answer 1

What mandatory FB functions (share, etc.) should be implemented in the game?

None. If you really want FB in the game, then the only required function is login. Facebook doesn't work without it.

For example FB.AppRequest for inviting a friend to try the game.
And what are FB.FeedShare and FB.ShareLink responsible for and how do they differ?

Read the Facebook manual. or try it on a test application - then you will understand the difference.