1: Bounce Rate: This refers to the percentage of website visitors who navigate away from the site after viewing only one page.
According to Google: "A bounce is a single-page session on your site. In Analytics, a bounce is calculated specifically as a session that triggers only a single request to the Analytics server, such as when a user opens a single page on your site and then exits without triggering any other requests to the Analytics server during that session."
Google further describes Bounce rate as "single-page sessions divided by all sessions, or the percentage of all sessions on your site in which users viewed only a single page and triggered only a single request to the Analytics server."
2: Time spent on page: The more average time visitors spend on your page coupled with low bounce rates serves as an indication to Google algorithms that you boast compelling content, which viewers find satisfying and spend more time reading.
3: Traffic: Wikipedia defines Web traffic as " the amount of data sent and received by visitors to a web site. This necessarily does not include the traffic generated by bots.
It further defines traffic as "the number of visitors and the number of pages they visit. Sites monitor the incoming and outgoing traffic to see which parts or pages of their site are popular and if there are any apparent trends, such as one specific page being viewed mostly by people in a particular country." Google algorithms also take cognizance of the amount of traffic your published web content is generating and uses same to rank search results.
4 Links: The more people share links to your content also serves as an indication that its content is endorsed. Consequently, Google's algorithm is more likely to rank content with more shares higher than a competing one with less shared links.