Today, however, SEM is used to refer exclusively to paid search. According to Search Engine Land, Search Engine Marketing is “the process of gaining website traffic by purchasing ads on search engines.” Search Engine Optimization, on the other hand, is defined as “the process of getting traffic from free, organic, editorial or natural search results.”
That's why PA and DA metrics often vary from tool to tool. Each ad hoc keyword tool we tested came up with slightly different numbers based on what they're pulling from Google and other sources, and how they're doing the calculating. The shortcoming of PA and DA is that, even though they give you a sense of how authoritative a page might be in the eyes of Google, they don't tell you how easy or difficult it will be to position it for a particular keyword. This difficulty is why a third, newer metric is beginning to emerge among the self-service SEO players: difficulty scores.
AWR Cloud, our third Editors' Choice, is rated slightly lower than Moz Pro and SpyFu as an all-in-one SEO platform. However, AWR Cloud leads the pack in ongoing position monitoring and proactive search rank tracking on top of solid overall functionality. On the ad hoc keyword research front, the KWFinder.com tool excels. DeepCrawl's laser focus on comprehensive domain scanning is unmatched for site crawling, while Ahrefs and Majetic can duke it out for the best internet-wide crawling index. When it comes to backlinks tracking, LinkResearchTools and Majestic are the top choices. SEMrush and Searchmetrics do a bit of everything.
Your website is the “hub” of your online brand – so, it’s important to have regular checkups to ensure everything is in order. It’s also important to note that your website is a living digital property, it’s typically not stagnant for long periods of time. In any given year, content is added and/or removed from your site. It is for this reason that audits should occur on a regular basis. We recommend that websites be audited at a minimum of once per year. That allows your teams to fix critical issues as they arise.