#1. Having a Purpose
I think this diagram clearly illustrates what a purpose can be.
Without a purpose, the blog doesn't really mean anything.
#2. Being Organized
Having an organized blog is just as important as having organized papers and files.
Posting in a certain order, creating tabs, and adding tags make the blog easier to navigate.
#3. Staying on Topic
As a reader, I don't want to go on a cooking blog and end up reading someone's life story. It is nice to have some personal details, but not so much that the reader forgets why they're on the blog in the first place.
#4. Using Descriptive Language
To describe food, saying it tastes good isn't enough to let the reader know what the food tastes like. Using more descriptive words, like the ones in the picture, will give a better understanding and will make readers more interested.
There are many more things that make a good blog, but these are a few things I like to see in blogs and make me want to continue reading.