A site map shows all the pages that are part of your website, so you can see exactly what is included and how all the URL structures will work. For example, if a page is going to sit underneath another page, like an ‘about us’ section, this will be represented in the site map.
You must choose a site map before having a website built, so the design and build teams know which pages to include. Discuss this with your web marketing agency before deciding on anything final, as the site map will really affect SEO. There will need to be certain pages to target certain keywords, so you need to have all your bases covered.
A marketing agency can also advise on the usability of your sitemap. The aim is to make sure people visiting your website can find exactly what they want on it, so a clear and concise site map will really help.