SEO (Search Engine Optimization) is the technical term for optimizing a website to a high position on a seach engine’s (i.e. Google) ranking. Ideally you want your website pages ranking as high as possible so they are more likely to be accessed by users searching online. The top search results on page 1 of Google receive the vast majority of search traffic, while those on page 2 and below receive very little traffic.
There are many factors which influence search engine placement and it’s not an exact science – these include a website’s domain authority, high-quality backlinks from external websites and content among others.