Google keeps changing which url shows up for the most important keywords for my review site as you can see below. When the /category/reviews page is the one that ranks, it drops about 50 spots. When the the main page is listed, it is in the top 10. Seo is an area I am trying to improve in, so I would appreciate any advice as to how I can keep the main page listed, as opposed to the /category/reviews page. Also, does anyone have an idea why it would change back and forth? Thanks in advance for the help.