How to Add Blogger Popular Post Widget in Blogger

Step-1:

Go to Your Blog

Click on Layout

Step-2:

Click on Add a Gadget

Step-3:

Now find Here Popular Post by Scrolling Down.

Step-4:

Now Select how much old post you want to show in Most Viewed
If you want to show thumbnail along with post, so keep check up in image Thmbail
If you want to show short description of your post, so keep check up in Snippet
And at last how much post you want to show, Select the number in Display up until