When readers come to your blog they usually come from referring sites or search engines and their interaction with your blog depends upon your content. If they liked the article they will comment and share it. So there must be attractive and usable section at the end of post, which will allow them to easily subscribe, comment, vote, check related articles and and share the post on social media sites.
I was searching for inspiration to design my blog post footer and saw different interesting blogs. I complied those blogs for your inspiration too. Do tell me which one you like or do share yours, it will help me to design my post footer