Rating enables you to give credit to a blog post or an article. For instance, you can give a 5 star rating for a high quality post or article. You can give a lower rating if you feel that the post or article doesn't meet your expectations. With Community Server, you can rate a post very easily.
In order to rate a blog post, log in as an administrator or as a user and from the home page navigate to a blog post for which you wish to give rating. You will now see a small rectangle with 5 stars as shown in the next screenshot:
If you point the mouse cursor over the stars, its colour will change as shown in the following screenshot. You will also be able to see a tool tip as shown in the screenshot if you point the mouse cursor over each star.
You need to click on the relevant star in order to rate a blog post. The stars will blink for a while after you click on them. When the blinking stops, the post will be rated and the rating stars will appear on the home page of the blog...