A Sitemap is a list containing all the URL’s of the website.
There are two types of sitemap-
a) HTML Sitemap - HTML sitemap is a separate web page present on the site for easy user navigation. All the web pages are presented here in hierarchical manner.
b) XHTML Sitemap- These files are made for search engine, to provide them ease of crawling.
Sitemap (.XML) can be generated using online sitemap generators. There are number of xml sitemap generators present on the web. One of them is XML
Generator. Link: - http://www.xml-generator.com/