The Google ranks that website on top of the page on its search engine results for any search term that they must considered to be the most relevant and useful informative website.
Maximum people agree these important ranking factors like Keyword usage, Site structure, Site speed, Time spent on site, Number of inbound links, Quality of inbound links.
The most important factor to rank the website is to target right quality of keywords take maximum time to select keywords. All depends upon the selection of right keywords if the keywords are not relevant the website must not rank in search engine.
After selection of keywords next important task is use generate high quality backlinks.