Keywords are an essential part of search engine optimization but it is very important to know how to use them effectively. One of the responsibilities of the SEO specialist is to conduct comprehensive research to determine which relevant keywords they should use for web marketing campaigns. Once the keywords are revealed they will be used in a wide variety of marketing strategies including content, blogs, ads, titles, and other forms of marketing media. Keywords can be a critical part of obtaining a high ranking in the search engine result pages. Each SEO campaign must start with extensive keyword search along with analysis to identify the most relevant and effective keywords to be incorporated into the campaign. During this research, the SEO professional will find two types of keywords: short tail keywords and long tail keywords. Each of these plays a different role and can have a major impact on an SEO campaign.