Maintaining and improving your website's search engine optimization (SEO) can be exhausting. Every time search giant Google changes its algorithm, business owners and their webmasters are left with their heads spinning, trying to make adjustments so their sites don't fall in Google's search rankings. Most recently, Google rolled out Penguin 2.0, a newer version of its previous Penguin algorithm update, which aims to cut down on web spam. While trying to keep on all of Google's changes can be a hassle, there are a large number of SEO factors that are unlikely to change any time soon. To help make SEO just a little easier, digital marketing firms Backlinko and Single Grain have created the infographic below, collecting some 200 factors that Google considers when ranking sites in its search results. The information was compiled from hundreds of sources, including SEO blogs and from statements made by Google's head of web spam, Matt Cutts.