It's an old post but there's some great advice.
I see this kind of question several times a week; you’re not alone - many websites have crawl errors.
1) 404 errors on invalid URLs do not harm your site’s indexing or ranking in any way. It doesn’t matter if there are 100 or 10 million, they won’t harm your site’s ranking. http://googlewebmastercentral.blogspot.ch/2011/05/do-404s-hurt-my-site.html
2) In some cases, crawl errors may come from a legitimate structural issue within your website or CMS. How you tell? Double-check the origin of the crawl error. If there's a broken link on your site, in your page's static HTML, then that's always worth fixing. (thanks )
4) You don’t need to fix crawl errors in Webmaster Tools. The “mark as fixed” feature is only to help you, if you want to keep track of your progress there; it does not change anything in our web-search pipeline, so feel free to ignore it if you don’t need it.
5) We list crawl errors in Webmaster Tools by priority, which is based on several factors. If the first page of crawl errors is clearly irrelevant, you probably won’t find important crawl errors on further pages.
6) There’s no need to “fix” crawl errors on your website. Finding 404’s is normal and expected of a healthy, well-configured website. If you have an equivalent new URL, then redirecting to it is a good practice. Otherwise, you should not create fake content, you should not redirect to your homepage, you shouldn’t robots.txt disallow those URLs -- all of these things make it harder for us to recognize your site’s structure and process it properly. We call these “soft 404” errors.
7) Obviously - if these crawl errors are showing up for URLs that you care about, perhaps URLs in your Sitemap file, then that’s something you should take action on immediately. If Googlebot can’t crawl your important URLs, then they may get dropped from our search results, and users might not be able to access them either.
"Today you’re going to use your Google Analytics account to identify higher quality traffic sources that your blog already has, so you can do more of what works, and less of what doesn’t. Combine these activities with what you learned last week about nurturing blog and brand advocates and you’re well on your way to a great traffic/growth strategy in 2015."
'I wait to cry'.
What should I expect to read when I click that? Other examples:
► Being The Only Person Alive
► I wait to cry
► Trigger Warning: Breakfast
Anyone else find this annoying or am I being a grumpy old man?
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