What is SEO?
SEO is the acronym for Search Engine Optimization. It is a technique used by professionals to increase the number of visitors by improving the position of the search engine results so that it is seen by more people. People do not generally go past the first page or so when searching for a business so ideally, that means if a business appears on the first page of the search results, the amount of traffic to that site increases and therefore the amount of business the company receives increases. This can be done in different ways but traffic normally is increased through free natural and organic means.
A business site can be found on the first page by appearing in the "map pack" which is the list of businesses that is mapped out, usually having a website and directions attached. A business site can also appear organically, which is where the website appears on the first page under the map pack and generally speaking, the higher on the list the business is organically, the more traffic the site receives. A business site can also appear as a paid ad placed on the front page either above the map or organic results or on the side of the page. Doing SEO on a site ensures that the website can be easily found by the search engine and determines the "ranking" of the website.
Ranking can be achieved by what is called "White Hat" practices which would be using keywords, back-linking, and relevant keyword rich content that completely follow the rules and policies of the search engine to become placed on the first page of the search results. Good, thorough and relevant content that includes common search terms lets the search engine know that you are an authority which the search engine wants to present to its users first, putting you closer to the top results which again brings the website more traffic. These services can be done for various search engines such as Google, Bing, Yahoo and more.