I'm getting url alias for all articles like mysite.com/node/14 but I wanted to set the url as aritcle titles like this: mysite.com/article-title
So, How to set all url alias as per the articles title?
Use Pathauto module.
The Pathauto module automatically generates URL/path aliases for various kinds of content
(nodes, taxonomy terms, users) without requiring the user to manually specify the path alias.
This allows you to have URL aliases like /category/my-node-title instead of /node/123.
The aliases are based upon a "pattern" system that uses tokens which the administrator can
change.