Comment and like post

That's easy - here is a step-by-step instruction:

1. Click on "Pinboards", then on a pinboard with a post
2. Under each post you will see "Like" and "Comment"
3. Click on "Like":
   1. The author of the post will be notified of your "Like"
   2. Going forward, you will receive notifications about new activity on the post, such as new comments and "likes"
4. Click on "Comment":
   1. Write a comment and press Enter i.e. the Return key
   2. The author of the post will be notified of your comment
   3. Going forward, you will receive notifications about new activities for the post, such as new comments and "likes"