"To follow the comments" means to pay attention to or read through the responses or opinions that people are sharing in the comment section of a post, article, or any online platform. Full definition
Trying to get a trend of what is effectively a trend produces all sorts of wonderful results, as you would know from following the comments of certain individuals. (judithcurry.com)
And mostly you just banter and follow my comments which is very troll like. (nystateofpolitics.com)
After several months of following the comments here, I have identified one, and only one, Christian poster whom I would like to emulate. (religion.blogs.cnn.com)