Adding your website to webmaster tools :
Before you can add your site to the webmaster tools you have
to first register in webmaster tools and then login, in the login area you
would find the option 'add a site', enter you website address here and click on
'continue', then click the 'alternate methods' and select the option 'add a
meta tag to verify the tag', copy this
meta tag, go to your site edit html page and then paste this tag between the
<head> and </head> tag, save the file and in webmaster tools, click
on 'save and verify'. This would add your site to webmaster tools, you can add
as many sites as possible with a single webmasters account.
Sitemaps :
Sitemaps are the html / xml representation of all
the page urls of your site, any sitemap file would have all the addresses of
each of its pages, When such types of sitemaps are created and submitted to the
search engines automatically, all the webpages of your website are entered in
the search engine directories. Each website has got one sitemap.