One of the ways you know your blog is actually reaching your audience is that sometimes people are commenting on posts written several days, weeks, months and in some cases years ago. No, I don’t mean spammers.
You know you are reaching your audience when someone takes the time to comment or like something you wrote a year ago. That means they actually came and your blog interested them enough look further, to used your search engine and read your posts, and leave a comment or a like.
A ‘like’ left on a post several months old tells you that the visitor was engaged in your blog. He or she took the time to search through the posts until they found one which interested them.