The Blog Manager that comes pre-installed in your AppStacks Canvas System allows you to provide a Blog for every registered user in your site, making it very easy to make your site a large social location, allowing users to post entries to their own blogs as well as post comments to other users' blogs. 

Blogs utilize the Content Management area of your system and entries go under the "Blogs" section using the user's username as category. Please refer to the sample data that comes pre-installed in your Canvas system for example. 

You can configure your blog appearance and other settings by going to the Blog setting area under "Components > Blog Manager".