How to add Related Posts Widget to Blogger
Step 1. Sign in your Blogger.com account.
Step 2. Go to http://www.linkwithin.com/
Step 3. Fill Form detail (Email ID, Website Address, Platform-Blogger, Width Max 5)
Step 4. Click on Get Widget to redirect Install Widget screen
Step 5. Select Blog you want to add Related posts widget then click add widget
Step 6. After add, Drag your related post widget below Blog posts
Step 7. Click Save button top right screen and view your blog to see the related posts below every blog post.
This is simple tutorial or it's display related posts blog Home page or Post Pages.