Checking the Google index is the process of determining whether a particular web page or website has been indexed by Google. Indexing is the process of adding a web page to Google’s database, making it eligible to appear in search results.
There are a number of reasons why you might want to check the Google index. For example, you might want to see if your website has been indexed after making changes to it. Or, you might want to see if a competitor’s website has been indexed for a particular keyword.