You will know if you see a message on your Google search console that says, "Your Page Quality Score for this query has been lowered due to the following issues:" then it's likely that your page was hit with one of those automatic penalties, and you should look into fixing them. Check out the results of a Google search for "site:http://www.YourDomain" to see if your domain is listed. This means that your website is most likely to have been penalized by Google if the search engine returns no results.