Generally speaking, sitemap is simply a website-map, showing all the pages and sub-pages of a website or a blog, which guides both visitors and search engines like Google, Yahoo etc. to roam around your blog. And when search engines roam around your blog, it is called indexing of your website. And as "indexing" is one of the most important aspects of SEO, so submission of sitemaps to Google/Yahoo/Bing is very very important.
[check out this post on how to submit your sitemap to Yahoo and Bing]For visitors, sitemap (when displayed in HTML format - you can create and download your Blog*Spot sitemap in HTML format from here, then upload this html file to MyDataNest and finally link it from your blog), shows how the pages and their subpages are interconnected, making it easier for them to navigate around big websites.
And being a webmaster/blogger you must have a sitemap, as it's a search engine optimization tool too, that helps you to get more traffic from the search engines.
Now if you are using blogger as your blogging platform, then there is no direct method to simply upload an xml or HTML sitemap file to your blog. So you can follow these steps to add a site map to your blogspot blog:
1. Go to Google Webmaster Tools website. [Here]
2. Login and then at the top (Add Site), type your blog's url :
3. Now you have to verify that you own that blog, so click on Verify your site, and select the "Add a Meta Tag" option.
Then copy the meta tag into your blog's "Edit HTML" section of "Layout" tab, and save the template.4. Then click on "Verify" at the bottom (in Google Webmaster account). So a message will be displayed:
5. Now click on Sitemaps link present at left side. Then click on "Add a Sitemap"
6. In "Choose Type", select "Add General Web Sitemap"
7. Then in the "My Sitemap url is" blank, type this:
atom.xml?redirect=false&start-index=1&max-results=100 (If you have up to 100 posts)
And if you have more than 100 articles or posts, then you have to add more sitemaps, after you have already added the previous one, like these:
atom.xml?redirect=false&start-index=101&max-results=100 (If you have up to 200 posts)
atom.xml?redirect=false&start-index=201&max-results=100 (If you have up to 300 posts)
atom.xml?redirect=false&start-index=301&max-results=100 (If you have up to 400 posts).
That's it, Now you can revisit your account after some days, and see a number of statistics provided by some of which are even better than Google analytics, as you can see the Google pagerank information for your blog's different pages, given by Google itself.