Essentially, SEO was born out of a need to make technical changes to web pages so that search engine crawlers had better access to content. But now that a generation has passed and crawler technology is not as primitive as it was.
Webmaster-managed bot access control methodologies, such as robots.txt files, robots tag directives, and HTTP headers, may need to be adjusted if you normally block all crawlers except for specific, preferred search crawlers.
Fortunately, at least one major contender, namely Majestic-SEO is perfectly open about things and lets you block their crawlers gracefully. If not, all that traffic created by Yandex search engine crawlers is something you may very well do without.
In recent weeks, I've seen several mishandled 404s, but one theme seems to return "200 OK" codes to search engine crawlers for 404 pages. If I place the mistyped URL above into the box at this page, I get a detailed list of how the page is seen...
Then, from 4:15 to 5:30 p.m.on Tuesday, June 17, consider going to the "Meet the Crawlers" session. But, we're not talking about those kinds of creepy crawlers. Nevertheless, this session will feature representatives from major crawler-based search...
Search engine crawlers view the 302 redirect as temporary. Complex URLs with a lot of parameters can cause crawlers to ignore the page altogether. This can prevent a search engine crawler from seeing the link.
People and crawlers are looking for this stuff, don't hide it! All flash site - Very, very pretty, but not a great experience for a crawler. Just make sure you offer text link navigation options and use a technique like Scalable Inman Flash...
Abbreviated states are sometimes misinterpreted by the crawlers. Make sure that your business name and address are featured prominently on the page as text, and not hidden from the crawlers in an image file.
A couple of examples that could create issues/block crawlers are: A secure login that blocks the crawlers from reaching the content post-login If there is a large discrepancy (more than 20 percent) between content that exists and the pages that...
All of the major search engine crawlers default to assuming you are intending to use the parameter to lookup different content from your site database. But all of these pages were invisible to the search engine crawlers, except the first page of...
Advertisers looking for a basic guide to purchasing paid inclusion should see the Submitting To Crawlers page. For example, someone with a brand new web site might submit their home page through a paid inclusion program in order to ensure that the...
Crawlers follow links, so if you have good links pointing at your Web site, the crawlers are more likely to find and include your pages in their databases. Indeed, this is the best way to get listed for free with all the major crawlers listed on...
The crawlers will keep listing your site based on its own merits. But what about crawlers? If you originally signed up with Yahoo hoping to influence crawlers, won't dropping your Yahoo directory listing cause you to be dropped by the crawlers?
Crawlers analyze links from across the web to decide which pages they should pick up and potentially rank well. If you still aren't doing well with crawlers, then spending the money with Yahoo may help you.
Submitting And Encouraging Crawlers Explains how to ensure that more of your content with a web site is indexed by crawler-based search engines. Blocking Crawlers With Robots.txt Explains how the robots.txt standard lets you tell search engines...
Registration forms effectively block search engines from indexing a web site, as the crawlers can't type a user name or password to access articles. Marshall's first step was to allow search engine crawlers to have complete access to everything...
That's why crawlers surpassed directories, which were better at getting the best on broad topics. There are easier way to build verticals and crawler-technology actually is one of the best ways to get at the long tail of queries.
The URLs in question are sectional header links, which from a crawler standpoint represent a duplicate pathway to our listings, one which I understand from our tech team is disproportionately load-intensive when hit by crawlers.
Crawlers do a great job of that. The key, of course, is that the crawler service isn't just comprehensive but relevant. The crawler-compiled card catalog will let you scan every word on every page of every book in the library.
Yahoo's human compiled directory structure helped make the service popular in my book because the directory lead to query refinement in a way the crawlers couldn't match. Google popularized that, and all the search engines went the crawler...
