Forum for your site is a great way to increasing a popularity of your website, but if you do not afford any good web host and free hosting creating trouble for you then simply insert Google groups as your forum software.
Many blogger like me is afford only a domain price and want a forum for our blogger blog,
so i choose a Google groups as a forum software for TECHELEX Forum Now we use MyBB as Forum Software.
How to Add Google Groups Blogger
1.Go to https://groups.google.com/groups/create and fill details then click on Create My Gruop
2.Add Some People in Groups and play with the setting.
3.Go to group setting copy a java code which is provided for Embedding your group .Its look like below code,replace Your Group Name with your group name in below code line 9.
4.Create a Staic Page.
5.Paste This code in your blogger Static page.
6.Go to Blogger Dashbord.
7.Go to Template Section.
8.Click on Edit HTML and Tick on Expand Widget Templates.
Copy a Static pages url and replace http://Yourdomain.com/p/forum.html with your static page url in below code line 1.
<b:if cond='data:blog.url == "http://Yourdomain.com/p/forum.html"'></b:if>
10.Place this code above
If you have any Doubt, Comment Below.