Web design can affect SEO in several different ways. If you're trying to build a website on your own, decisions you make could negatively impact how well visitors are able to find your website when they search for products or services you offer. Things like page loading speeds, navigational structure, and headline tags can all impact how well your website is found during a search query. Everything you do and say on your website should be geared at enticing website visitors to stay and connect with your brand.