|Crawl Erros (Image source:- Bleachernation)|
These errors might be seen by the users as well and it may harm your reputation. One of the biggest issues that crawl errors may create is the proper flow of PageRank. Hence, it is suggested to solve the crawl errors as soon as possible and make your site accessible to both the user and the search engines.
Google shows you a list of both web and mobile content on Webmaster Tools and also gives you options to notify Google when you have solved the problem.
Types of Crawl Errors
Soft 404 Error - These happens when the server does not return a proper 404 error.
Not Found Error- The most common 404 errors fall into this category.
HTTP Error- 403 pages or 400 pages.
Sitemap Errors- Some errors that are found in your Sitemap.xml
Timed Out- Generally returned because the server remains busy.
New Crawl Error Alert Feature in Google Webmaster Tool
Rich Snippets in Google
Google Knowledge Graph
Google Search Tips and Tricks
Stop Words in Seo