Search engine optimization (SEO) expands and increases visibility of a website in search engine listings according to search optimized keyword phrases and link popularity.Search engine algorithms focuses on site structure. Clean structure of the website with less coding in between site content can make a difference in your quality websites. Ensure to avoid using HTML editors while designing the website as they generate excess coding. This confuses the spiders. Try to have your coding simple and easy for the spiders to find the content fresh and quality oriented.