Educate yourself about ppc tracking services
This was a two step process where the spider after "Crawling" the page would save the information on search engine's own server where a second program known as the indexer would extract the relevant information from page. For crawling at later date the data was saved in a scheduler. Website owners recognized the value of the benefits a highly ranked and more visible site in a search engine generated. Types of SEO services can come as individual service package or a marketing campaign at a bigger level. Also since to get a higher and better level of traffic for a site, SEO Services will make changes to the HTML source code and hence it comes as part of web site development and design.