If you want to join multiple groups automatically then you would like to have a automation script or tool which can does this stuff for you. Here this post is exactly doing what you required by using bot-studio automation library. Below are the coding steps to move on:-
- Install bot-studio
pip install bot-studio
2. Import bot-studio and login to linkedin. You can see here to login with cookies.
3. Now join the group by calling a simple function join_group by passing the group link