Spiders, robots and crawlers are your friends. If you want SEO, you not only need to like them, but you actually need to go out of your way to attract them to your site.
In SEO terms, spiders, robots, and crawlers are all roughly the same thing, but don’t worry too much—none of them have legs or antennae. So, let us use the word "crawler" to call them all. Keep in mind that sometimes you need to attract these bots, or disguise your site as "spider bait." It all falls under the same principle. So, what is a crawler? Why should we invite it to my website? A crawler is a program or an automated script (often called a bot, short for robot) that keeps running hard to various URLs on the Internet. Crawlers crawl from one URL to another through the links on the web pages they browse.
Major search engines continuously send their crawlers out to browse the vast expanse of the Internet. The crawler first finds each page, then copies the text and code on the page and stores it on their huge index server. This process is called crawling. This huge index is actually a database containing all website pages that search engine crawlers can successfully access. The index is used as a repository to get results very quickly when you search. When you enter a search term on a search engine such as Google and submit it, you are actually searching all the content indexed by the search engine, not the actual content of the Internet at that time. Of course, web pages change. Sometimes, web pages and websites change in very short cycles. In addition to this, new websites and web pages appear at a rapid pace all the time. That's why crawlers are always there, browsing the web over and over again, and building and updating search engine index information. The content in the search engine index library is what the crawler sees when browsing the web. What the crawler sees may be very different from what the average visitor sees. If you want to see what the content of a webpage seen by the crawler is, you can use the IE browser to access it, then press the Ctrl-A key combination and browse the copied content (if it is a Mac system, you can use Apple-U key combination). Or, you can use Google and click on the "Web Snapshot" link under the search results to see the recent snapshots of the page taken by the crawler. First and foremost, crawlers combine words and phrases from every page they crawl. They index text and links. When you enter a search term into the search box, the search engine tries to find the web page that best matches the search phrase. Different search engines have their own unique crawlers, and as you might expect, they don't all operate in exactly the same way. Some crawlers retrieve all of the content on a page, while others may be interested in only certain parts of it. Most crawlers believe that the title of the page and the content near the top of the page are more important than the content further down the page. Crawlers often encounter and overcome obstacles when crawling a website, say, where there are no links that allow them to continue crawling, or they encounter problems caused by weird technology or code. Crawlers may also fall into traps due to technical obstacles that prevent them from completing their work easily. So, an important part of the first step in any SEO effort is making it easier for crawlers to discover and crawl your site. If your site has not been crawled by crawlers, they will not build search engine indexes of your site. If a page is not indexed, searchers won't find it in search engines because search engines think the page doesn't exist. At the same time, searchers may find other pages, most likely those of your competitors. Links and well-designed site structure are the bridges that establish the relationship between individual web pages and website sections and other web pages and sections within the site. This will provide crawlers with a clear path to crawl on.
Create sitemap
Creating a sitemap is one of the easiest ways to help search engine crawlers crawl your site. A sitemap is a file (usually in xml format) that provides crawlers with a list of URLs for website content—at least the addresses that the website owner wants the crawlers to see. The sitemap can also include additional information for each URL, such as when the specified page was last updated, how often it is updated, and its importance relative to other content on the site (for example, the homepage is more important than the "Contact Us" page) . The information provided by sitemap helps search engine crawlers crawl the website more intelligently. Google, MSN, Yahoo! and Ask all accept requests from website owners to submit sitemaps. However, it should be noted that no company guarantees that the URLs submitted for sitemap will be crawled or indexed. Sitemaps are useful for websites that provide information that is not easily browsed directly. For example, some sites store large archives or databases of information that can only be seen through user searches. Remember, crawlers only crawl information based on links, and usually, such information lacks links to point to.
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