What benefits does the application get when integrating with social networks?

Question

Marketing

From the point of view of promotion - after all, you still have to PR through networks?

Answer 1

1. Easy entry. That is convenience.
Since not everyone wants to bother writing their mail, but here you just need to press a button.
Not everyone wants to shine their phone.
Not everyone wants to remember a password.
2. Then comes the social orientation.

Answer 2

At least social orientation. Loading a list of friends, interacting with them, etc.