Google Search Console provides detailed information on how your site appears in Google searches. You can find out which keywords (that is, the search terms users are typing into Google) are driving traffic to your site, how highly your site ranks in searches of specific keywords, which pages within your site are attracting search attention, and other information that's highly useful for search engine optimization and site-maintenance tasks. You can also submit a sitemap of your website to Google, remove certain pages from being listed on Google, and more.
- You can access Google Search Console (previously called Webmaster Tools) at https://search.google.com/search-console/welcome.
On this page, select the "URL prefix" box and enter your site URL.
You'll be prompted to verify that you are the administrator of the site you entered.
Under "Other Verifications methods" tab, and select "HTML Tag."
Expand the box and copy the meta tag provided.
Add the meta tag to the "Themes" section of your site in the "External Assets" field.
Note: You may need to publish your homepage after adding the code for Google to see the new code in the header.
Return to Google Search Console and click the "Verify" button to complete the process.
If you no longer see this popup, click the "Already started? finish verification" link on the welcome page to return to it.
After you have set up Google Search Console/Webmaster Tools for your site, then you can submit your site's dynamic XML sitemap file. This will give Google useful context on your site's layout and content, enhancing its relevance in user searches. Refer to Submit sitemap to Google Search Console to learn more about this process.
More from Google Help is located here: http://www.google.com/support/webmasters/bin/answer.py?answer=34575&topic=13451