This article describes how search engine optimization(SEO) is becoming an increasing useful technique in online marketing as more people look to the internet to search for information. Search Engine Optimization enables web developers to develop web pages which have a high SERP rankings. A key technique in SEO is through improving the keyword prominence of keywords. In this research, keywords within web pages are extracted, and the correlation between the frequency of these words and their keyword prominence is evaluated. The findings of this research will provide a guideline to SEO practitioners, in that they will have a better understanding of the ratio of keywords they need in to add to web pages in relation to the rest of the content.