So I am signed in github and I fork a project . Will my forked repo get updated everytime the original repo updates ? Or should I do forking from the original repo everytime so
Will my forked repo get updated everytime the original repo updates
No. Fetching from the original repo from time to time is completely up to you. You can easily do it at your local repo (by convention, the original remote is called upstream while the fork remote is called origin).