SEO or search engine optimization, is the process of improving a website's visibility in search engines. SEO service providers are dedicated to improving the web traffic for their clients. They make modifications to the content and presentation of a website to improve a user's experience. They often focus on on-site SEO, off-site SEO, international SEO, local SEO. If you are looking for top SEO services be sure to check out some SEO packages of top providers.