Webcawler

Webcawler

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From Wikipedia, the free encyclopedia
This article is about the search engine . For web crawling programs in general, see web crawler .

^ Jump up to: a b "Short History of Early Search Engines" . The History of SEO . Retrieved 2019-02-03 .

^ Jump up to: a b c d e f g h i j "WebCrawler's History" . www.thinkpink.com . Archived from the original on 2005-11-28 . Retrieved 2019-01-09 .

^ Lammle, Rob (2012-03-16). " '90s Tech Icons: Where Are They Now?" . Mashable . Archived from the original on 2012-03-17 . Retrieved 2019-02-18 .

^ "Se-En" . searchenginearchive.com . Retrieved 2019-01-25 .

^ "WebCrawler Select: Review Categories" . WebCrawler . 1996-10-24. Archived from the original on 1996-10-24 . Retrieved 2019-02-03 .

^ Keogh, Garret. "Excite buys WebCrawler from AOL" . ZDNet . Retrieved 2019-01-15 .

^ Sullivan, Danny (1997-06-16). "The Search Engine Update, June 17, 1997, Number 7" . Search Engine Watch . Archived from the original on 2016-04-14 . Retrieved 2019-02-02 .

^ R. Notess, Greg (2002). "On the Net: Dead Search Engines" . InfoToday . Archived from the original on 2002-05-25 . Retrieved 2019-01-16 .

^ Brid-Aine Parnell (December 18, 2012). "Search engines we have known ... before Google crushed them" . The Register . Retrieved November 17, 2016 .

^ "Leading Leaders" . A9 Management web page . Archived from the original on November 14, 2016 . Retrieved November 15, 2016 .

^ "Blucora to sell InfoSpace business for $45 million" . Seattle Times . July 5, 2016.

^ "System1 raises $270 million for 'consumer intent' advertising" . L.A. Biz . Retrieved 2017-12-01 .

^ "WebCrawler Search" . WebCrawler . 2018-05-31. Archived from the original on 2018-05-31 . Retrieved 2019-02-02 .

^ "WebCrawler Search" . WebCrawler . 2018-11-30. Archived from the original on 2018-11-30 . Retrieved 2019-02-02 .

^ McGuigan, Brendan (2007). "What was the First Search Engine?" . WiseGeek . Archived from the original on 2007-04-27 . Retrieved 2019-02-18 .

^ "Search Engine History.com" . www.searchenginehistory.com . Retrieved 2019-01-25 .

^ "Infographic: Top 20 Most Popular Websites (1996-2013)" . TechCo . 2014-12-26 . Retrieved 2019-01-15 .

WebCrawler is a search engine , and one of the oldest surviving search engines on the web today. For many years, it operated as a metasearch engine . WebCrawler was the first web search engine to provide full text search. [1]

Brian Pinkerton first started working on WebCrawler, which was originally a desktop application, on January 27, 1994 at the University of Washington . [2] On March 15, 1994, he generated a list of the top 25 websites. [1]

WebCrawler launched on April 21, 1994, with more than 4,000 different websites in its database [2] and on November 14, 1994, WebCrawler served its 1 millionth search query [2] for "nuclear weapons design and research". [3]

On December 1, 1994, WebCrawler acquired two sponsors, DealerNet and Starwave , which provided money to keep WebCrawler operating. [2] Starting on October 3, 1995, WebCrawler was fully supported by advertising, but separated the adverts from search results. [2]

On June 1, 1995, America Online (AOL) acquired WebCrawler. [2] After being acquired by AOL, the website introduced its mascot "Spidey" on September 1, 1995. [2]

Starting in April 1996, [2] WebCrawler also included the human-edited internet guide GNN Select , which was also under AOL ownership. [4] [5]

On April 1, 1997, Excite acquired WebCrawler from AOL for $12.3 million. [2] [6]

WebCrawler received a redesign on June 16, 1997, adding WebCrawler Shortcuts, which suggested alternative links to material related to a search topic. [7]

WebCrawler was maintained by Excite as a separate search engine with its own database until 2001, when it started using Excite's own database, effectively putting an end to WebCrawler as an independent search engine. [8] Later that year, Excite (then called Excite@Home ) went bankrupt and WebCrawler was bought by InfoSpace in 2001. [2]

Pinkerton, WebCrawler's creator, led the Amazon A9.com search division as of 2012. [9] [10]

In July 2016, InfoSpace was sold by parent company Blucora to OpenMail for $45 million, putting WebCrawler under the ownership of OpenMail. [11] OpenMail was later renamed System1. [12]

In 2018, WebCrawler was redesigned from scratch and the logo of the search engine was changed. [13] [14]

WebCrawler was highly successful early on. [15] At one point, it was unusable during peak times due to server overload. [16] It was the second most visited website on the internet in February 1996, but it quickly dropped below rival search engines and directories such as Yahoo! , Infoseek , Lycos , and Excite in 1997. [17]

April 20, 1994 ; 28 years ago ( 1994-04-20 )

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Home Blog Internet Web Crawler 101: What Is a Web Crawler and How Do Crawlers Work?
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Search engines are the gateway of easy-access information, but web crawlers , their little-known sidekicks, play a crucial role in rounding up online content. Plus, they are essential to your search engine optimization (SEO) strategy.
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A web crawler , also referred to as a search engine bot or a website spider, is a digital bot that crawls across the World Wide Web to find and index pages for search engines.
Search engines don’t magically know what websites exist on the Internet. The programs have to crawl and index them before they can deliver the right pages for keywords and phrases , or the words people use to find a useful page.
Think of it like grocery shopping in a new store.
You have to walk down the aisles and look at the products before you can pick out what you need.
In the same way, search engines use web crawler programs as their helpers to browse the Internet for pages before storing that page data to use in future searches.
This analogy also applies to how crawlers travel from link to link on pages.
You can’t see what’s behind a can of soup on the grocery store shelf until you’ve lifted the can in front.
Search engine crawlers also need a starting place — a link — before they can find the next page and the next link.
Search engines crawl or visit sites by passing between the links on pages. However, if you have a new website without links connecting your pages to others, you can ask search engines to perform a website crawl by submitting your URL on Google Search Console .
You can learn more about how to check if your site is crawlable and indexable in our video!
Crawlers act as explorers in a new land.
They’re always looking for discoverable links on pages and jotting them down on their map once they understand their features. But website crawlers can only sift through public pages on websites, and the private pages that they can’t crawl are labeled the “dark web.”
Web crawlers, while they’re on the page, gather information about the page like the copy and meta tags . Then, the crawlers store the pages in the index, so Google’s algorithm can sort them for their contained words to later fetch and rank for users.
So, what are some examples of web crawlers?
Popular search engines all have a web crawler, and the large ones have multiple crawlers with specific focuses.
For example, Google has its main crawler, Googlebot, which encompasses mobile and desktop crawling. But there are also several additional bots for Google , like Googlebot Images, Googlebot Videos, Googlebot News, and AdsBot.
Here are a handful of other web crawlers you may come across:
Bing also has a standard web crawler called Bingbot and more specific bots, like MSNBot-Media and BingPreview. Its main crawler used to be MSNBot, which has since taken a backseat for standard crawling and only covers minor website crawl duties now.
SEO — improving your site for better rankings — requires pages to be reachable and readable for web crawlers. Crawling is the first way search engines lock onto your pages, but regular crawling helps them display changes you make and stay updated on your content freshness. Since crawling goes beyond the beginning of your SEO campaign, you can consider web crawler behavior as a proactive measure for helping you appear in search results and enhance the user experience .
Keep reading to go over the relationship between web crawlers and SEO.
Ongoing web crawling gives your newly published pages a chance to appear in the search engine results pages (SERPs) . However, you aren’t given unlimited crawling from Google and most other search engines.
Google has a crawl budget that guides its bots in:
It’s a good thing there’s a crawl budget in place. Otherwise, the activity of crawlers and visitors could overload your site.
If you want to keep your site running smoothly, you can adjust web crawling through the crawl rate limit and the crawl demand.
The crawl rate limit monitors fetching on sites so that the load speed doesn’t suffer or results in a surge of errors. You can alter it in Google Search Console if you experience issues from Googlebot.
The crawl demand is the level of interest Google and its users have on your website.
So, if you don’t have a wide following yet, then Googlebot isn’t going to crawl your site as often as highly popular ones.
There are a few ways to block web crawlers from accessing your pages purposefully. Not every page on your site should rank in the SERPs, and these crawler roadblocks can protect sensitive, redundant, or irrelevant pages from appearing for keywords.
The first roadblock is the noindex meta tag , which stops search engines from indexing and ranking a particular page. It’s usually wise to apply noindex to admin pages, thank you pages, and internal search results.
Another crawler roadblock is the robots.txt file .
This directive isn’t as definitive because crawlers can opt out of obeying your robots.txt files, but it’s handy for controlling your crawl budget.
Check out our SEO Guide for Marketing Managers to start driving more site traffic, leads and revenue!
After covering the crawling basics, you should have an answer to your question, “What is a web crawler?” Search engine crawlers are incredible powerhouses for finding and recording website pages.
This is a foundational building block for your SEO strategy, and an SEO company can fill in the gaps and provide your business with a robust campaign to boost traffic, revenue, and rankings in SERPs.
Named the #1 SEO firm in the world , WebFX is ready to drive real results for you. With clients from a range of industries, we have plenty of experience. But we can also say that our clients are thrilled with their partnership with us — read their 863+ testimonials to hear the details.
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