@Zirkon Kalti I like your simple and to the point explanation. Sure an Internet bot or we can say web crawler which thoroughly browses the World Wide Web, basically for the intention of Web indexing.The search engine bot travels around the web to find new webpages to crawl and get them indexed. If your website is down, the search engine bot will not be able to access and crawl it. The bot will come back to your site every now and then to crawl new content. If your site is frequently down, the search engine bot may give up in crawling it which can lead to your site completely disappear from the SERP result and never get reindexed again.