SEO or Search Engine Optimisation is the tool or method to ensure that websites will be searchable in search engine by using particular keywords or phrases related to the website. It also a helpful way used by boston digital agenciesto increase the organic traffic of the websites, it is done by optimizing the website links, this includes the backlinks and also other aspects such as the pages or the content of the site, or codes for it to be easily crawled by the search engine crawlers.