Can I remove sa login from SQL server?

Question

I am a beginner in database field and this question might sound too stupid but I want to know why there is a login called sa and can I delete it?

I want to delete it

Answer 1

sa is the main administrator account, it was the owner of master database (holding data for user roles,schema,etc), so it can't be deleted.

just change the password (and i think it was asked in installation progress) and create guest/public account with more restrictive privileges for use with your application a.k.a don't use sa in your application (application you develop)