A Search Engine Optimization (SEO) Specialist works to positively manipulate the way search engine web crawlers view a website. As an SEO specialist, your responsibilities include changing the layout, copy, and content of the site, and discovering new avenues through which to help your client rank. You determine the most profitable search keywords to target, organically weaving them into your client’s web content. You may also need search engine marketing (SEM) skills, as keywords are integral to this marketing avenue.