if you have more pages in your website then mustily create sitemap for website because its help to index web page on search engine

sitemap is your site full Map
 

sitemap is your site full Map link to find search engine all data get...more learn Visit CLICK HERE

site map informs search engines that individual pages on your site are new or updated and are available for crawling.

Sitemap is a file where all pages and posts are linked with priority so that search engines can easily find the list of links to crawl and index.

it shows the how the site pages is listed

what is site map?
 

A site map is a visual or textually organized model of a Web site's content that allows the users to navigate through the site to find the information they are looking for just as a traditional geographical map helps people find places they are looking for in the real world.

sitemap means the total important page list of your website.

If you are building a site on Wordpress platform I think Google XML site map plugin is the best for you

A site map (or sitemap) is a list of pages of a web site accessible to crawlers or users. It can be either a document in any form used as a planning tool for Web design, or a Web page that lists the pages on a Web site, typically organized in hierarchical fashion.

A site map is a list of pages of a website.

I am launching a medical discussion forum for sharing study materials and discussing other topics. The forum will probably grow fast and reach at least a few hundred topics. Should every discussion topic be included in the sitemap?

A map of all your pages is a sitemap. You should create it in order to make your website easier for browsing and to reduce the eventual bounce rate. Submit it to the search engines.

Sitemapping is the best

A site map is a model of a website's content designed to help both users and search engines navigate the site. A site map can be a hierarchical list of pages (with links) organized by topic, an organization chart, or an XML document that provides instructions to search engine crawl bots.

Site Map is a map of site where all pages of website is linked. It is basically two types,
HTML Site Map
XML Site Map
HTML Site map is created and publish and linked to website for user understanding of complete website in single page and glance but XML Site Map is created and publish to website for search engine understanding. It helps search engine to index page and content. XML is Server side scripting language but HTML is a user side design scripting language.