If you have your own web site, have you ever tested for broken links? The more broken links a web site has, the lower its Google Ranking will be. I don’t profess to be an expert in this field but I recently ran a test on my site and found that a number of links no longer were valid so I fixed them. If you want to determine whether your site has broken links, you can use a free service at Broken Link Checker.
One other means of improving a site’s Google ranking is to make it mobile friendly. Google provides a free service that checks your site to ensure it is mobile friendly which you can find here.
Of course, there are companies that provide comprehensive site analytics for a price but I thought I would pass this information along for the DIYers.