@amitvermaApr 20.2018 — #GoogleBot is a website crawler bot which crawls all the links associated with search terms and indexes that term in Google's search indexes. According to that indexes, search engine decides ranking website for a particular keyword.
@VITSUSAApr 21.2018 — #Googlebot is Google's web crawling bot. crawling is the process by which Googlebot discovers new and updated pages to be added to the Google index.