Question: How To Add RSS Feed To A Blog?
Answer: If you want to add RSS feed on wordpress.com, directly go to http://yoursiteurl.wordpress.com/wp-admin/widgets.php and their you will get a widget named by “RSS“. Click on it and go for edit. After that, paste your desired rss feed url e.g. http://techidea.wordpress.com/feed or http://googlecrawling.blogspot.com/feeds/posts/default or http://feeds.feedburner.com/GoogleCrawling or it can be different or vary by blogging platform. After then you can select more options and which can open more features. Such as, how much contents, authors name, dates and so on.
If you wants to add RSS feed on blogger.com, directly got to http://www.blogger.com/layout?blogID=3421910664549386138
Layout >> Page Elements >> Add A Page Element >> Feed. As well do the same things and paste your desired feed url and select or edit your desired titles.
However, answer should be broad. Can you please be specific what actually you’re looking for? Or leave you comments below and I can checkout your problems and tried my best to resolve it;-)