Yes quality of the article is very important. People will read your article only if it is of any interest of them.
I can see many people are posting just for posting. That might have negative affect on their score.
The system judge your writing, compare whether it is copied or not, and evaluate and gives you mark.
You can see that on your Steemit board award page in the Daily author badge. Click on the badge it will
inform you all. There is small number at bottom and that is QUALITY as they scrutinized.