People are not going to spend all day on your website. But when they are on, you want to make their experience as convenient as possible. Writing great content is one way to do that. Letting your readers know how long it might take them to go through your articles is not a bad idea either. Post Reading Time is a simple plugin that displays reading time for your site.
The idea behind this plugin is simple: it gives your visitors an idea how long it will take them to go through your article. It is highly customizable. I personally go with 200 wpm as speed but you can choose a higher or lower number. Time can be shown in minutes, or minutes and seconds. The prefix and suffix output can be changed too.
Post Reading Time may not enhance your website by a whole lot but it does make it more user-friendly. It is pretty simple to implement and does what it promises.