The priority given to the placement of a link on the results page of a Web search. For example, Google's PageRank system, named after co-founder Larry Page, classifies a site based on the number of links that point to it from other sites (the "backlinks"). The concept is that if very prominent sites link to a site, the site has greater value. The more popular the backlink sites themselves are, the higher the ranking as well.
Search Results: Ordered by relevance to your query, with the result that Google considers the most relevant listed first. Consequently you are likely to find what you’re seeking quickly by looking at the results in the order in which they appear. Google assesses relevance by considering over a hundred factors, including how many other pages link to the page, the positions of the search terms within the page, and the proximity of the search terms to one another.
Facebook Ads, which has an unparalleled targeting system (and also allows you to advertise on Instagram). Facebook Ads has two main strengths: retargeting based on segmented marketing and custom audiences and the ability to introduce your brand to customers who didn’t know they wanted it. Google AdWords is all about demand harvesting, while Facebook Ads is all about demand generation.
Say you're running a PPC ad for the keyword "Nikon D90 digital camera" -- a product you sell on your website. You set up the ad to run whenever this keyword is searched for on your chosen engine, and you use a URL that redirects readers who click on your ad to your site's home page. Now, this user must painstakingly click through your website's navigation to find this exact camera model -- if he or she even bothers to stick around.
If you have the Google toolbar installed in your browser, you will be used to seeing each page’s PageRank as you browse the web. But all isn’t always as it seems. Many pages that Google displays the PageRank for haven’t been indexed in Google and certainly don’t have any PageRank in their own right. What is happening is that one or more pages on the site have been indexed and a PageRank has been calculated. The PageRank figure for the site’s pages that haven’t been indexed is allocated on the fly – just for your toolbar. The PageRank itself doesn’t exist.