Bots, spiders, or web crawlers are all same things and refer to the same idea. Basically, bot is used to crawl the web. It crawls web pages with the help pf a link in order to read and find out updated content so that it can decide what should be added to the index. The index refers to the ranking sheet of search engines. Google and other search engines use a lot of devices and computer to send their crawls to every possible web page that exists in order to find out the quality and information provided there.
How Bot Visits Your Website While talking about Bot, we frequently used the term GoogleBot as most of the shares of search engines are held by Google thus the rankings of other search engines does not matter a lot. GoogleBot uses databases of links that are discovered form previous crawls and sitemap in order to decide which web page should be visited next. Whenever the crawler or bot find some new link or information on the website, it lists them to the pages that will be visited next. If GoogleBot finds some broken links while crawling the website, it updates its indexing
You should check the crawlability of your website for the purpose of ensuring that you website can be indexed by GoogleBot or not. If GoogleBot is unable to crawl to your website, it will never get any position in the Google Search Engine Result Pages (SERP). You should look for all the technical issues and errors that are hindering the access of GoogleBot to your website.
Search Engine Console is the best tool provided by Google to check the crawlability rate of your website. You can fix all the crawlability issues there with a lot of flexibility and ease.