SEO, or search engine optimisation, is possibly the most important thing to think about when you are building or maintaining a website. It controls how search engines view your website, and is therefore important to help you achieve good search engine page rankings.
SEO can be split into two main parts; on-page SEO and off-page SEO. The most important aspect of on-page SEO is keyword use. Keywords are what search engines like Google and Bing look for when they are reading your page. They are the terms which people can search for in order to find your page. Clever use of relevant keywords can dramatically boost your sites visibility, and you will therefore find yourself with a lot more visitors!