Some of you may observed that in some websites like Facebook(even in mine) there will be navigation bar that come along you when you scroll down. Sometimes its necessary to have the navigation bar sticky to attract visitors towards your blog category, older posts, social connect etc.
It is the J Query code that is making this possible. Even you can make this in your blog. To do this you should have Widget ID of the widget that you are going to make sticky.
To make installation more simple I have made a video by which you can know how to find Widget ID and also to install J Query code. Allow annotations in the video for explanations.
You can also follow these steps To install