Only post programming/code related questions please:-
But to answer your question, if you follow a Q&A thread you will receive notifications of other users answers, users who uplike your comments, anything related with the thread.
Whenever you reply in any thread, Sololearn automatically select the star (🌟) . It is like whenever you create new profile, you automatically follow to SoloLearn.
Have you ever noticed after giving answer in any thread, you get notifications?