404 errors, the dreaded "page not found" message Internet users encounter, are the bane of every good/great webmaster.
404s reveal when there is a problem but the problem may not be their fault. Google's John Mueller recently indicated that most of the 404 error codes that Google identifies are not often webmasters fault, but rather are as a result of others linking incorrectly.
Since 404 errors don't cause ranking issues, they should not really be a top concern. That being said, of course, it is useful to review your analytics account to understand where 404s are resulting/originating from so that they can be me modified in order to improve the digital experience for users.
Digital marketing executive with proven experience in all aspects of search engine optimization (SEO), performance-based advertising, consumer-generated/social media, email marketing, lead generation, Web design, usability, and analytics. - 20-year Internet marketing veteran, currently serving as the Digital Marketing Campaign Manager at Antenna Group (formerly Chicago Digital). - Former Editor-In-Chief of Website Magazine, and a regular speaker on Web technology digital marketing strategy - Author of several books on digital marketing Including Web 360: The Fundamentals of Web Success; Affiliate 360: The Fundamentals of Performance Marketing; Domains 360: The Fundamentals of Buying & Selling Domain Names, and SEO 360: The Fundamentals of Search Engine Optimization.