Whenever a webmaster or a blogger writes any standard quality contents it is their sole responsibility to access the google search console and index or de-index as per their need. Webmasters may also use sitemaps to index or to allow the google bot to crawl their website.
Building good backlinks is a cool way to improve SEO score. Backlinks can be built with numerous methods. Some of the most common methods are as guest article posting, writing high quality contents, submission in directory sites and so on.