How you guys keep track of your favorite stocks and how do you keep tracking the performance of your owned stocks

The trading platform you buy / sell on will have most of the basic features. For additional features you will need to do it in excel on your own

Groww and watchlist. Any brokerage firm works though. And read about the quaterly/ annual reports

Make a portfolio on Moneycontrol or Value Research, it gives more extensive insights. However you'll have to manually input your transactions, prices etc.