RSS (Really Simple Syndication) feeds make it possible for subscribers to be automatically notified of changes. Using RSS feeds on a Blogger blog means that anyone who's subscribed to your feed will be sent notification when you add a new post. To set up your blog for feed readers to track it, follow these steps.

Step 1
Log in to Blogger.

Step 2
On your "Dashboard," scroll down to the "Blogs" section. You'll see the list of all your blogs on Blogger.

Step 3
Next to the title of the blog you want to use RSS feeds on, click on the gear under "Change Settings" for that blog.

Step 4
On the new page under the "Settings" tab, you'll see the following links: "Basic," "Publishing," "Formatting," "Comments," "Archiving," "Site Feed," and "Email Members."

Step 5
Click on the "Site Feed" link.

Step 6
On the new page next to "Publish Site Feed," click the drop-down menu. Select "Yes."

Step 7
Next to "Descriptions," select "Full" to syndicate the full content of your posts or "Short" to only syndicate the first paragraph.

Step 8
Next to "Site Feed URL" is the address for your blog feed.

Step 9
Next to "Article Footer" you can add a signature, link backs or any other information you'd like at the end of each feed.

Step 10
Click on "Save Settings" button.

Step 11
You may need to republish your blog to see changes take effect.

Source : www.ehow.com