In short, it means I read it. When I hit the ‘like’ button on a blog post, that means that I read the blog post. It means that I read the title, I was intrigued, I clicked on the link, and read the post, or watched the video, or looked at the photos.
It doesn’t necessarily mean that I enjoyed the content, or that I agree with it. But I was interested enough to read from start to finish. If I thought it was interesting, but it was really, really long and I only read half or a quarter, that won’t get a like. Because that would feel disingenuous to give someone a like if I didn’t even finish reading all the words they took the time to put down. If I thought it was interesting, but I certainly didn’t agree, or it even made me angry or disappointed or confused, that will still get a like. Because I finished reading it and it gave me food for thought.