(v Places, PPC, Shopping, Images, Video etc)
Google (and other search engines’) results pages contain results from a variety of sources. Organic results (typically 10 a page) are organised by the analytical algorithms that the search engine employs, and do not cost the website owner anything once somebody clicks on a result. Improving a website’s positioning for the key-phrases that are relevant (i.e. people are likely to search for) to their business is referred to as Search Engine Optimisation. Typically the majority of visitors (sometimes as high as 95%) to your site will find it through organic results.