What is  a Web Crawler and how to Make it Love your website

It is the SEs that will ultimately work for in terms of bringing your internet site to the notice of the potential buyers. Hence it’s much better to know how these SEs really act and how they present data to the customer starting from a search.
There are fundamentally two types of search engines. The first is by robots called crawlers or spiders.
SEs use crawlers or occasionally called to index sites. When you submit your site pages to a SE by filling out their required submission page, the SE spider will index your entire web site. A ‘crawler’ is an automatic computer program that is used by the SE system. Crawler visits a site, study the content of the actual web site, the web site`s Meta tags and also follow the links that the site points to. The crawler then generates all that information and sends it back to a main central hub, where all of the information is indexed systematically. It will inspect each website`s link you’ve on your site and index all of those web sites as well. Some crawlers will only index a certain number of pages on your web site, so don’t create a site with 500 pages in start, increase the size of your site and the number of gradually over time!

The crawler will periodically come back to the web site to check for whatever information that has been changed or added. The frequency with which this occurs is decided by the moderators of the search engines crawlers.

A crawler is virtually like a Bible where it carries the table of contents, the real articles and the links and acknowledgments for all the sites it comes up during its hunting, and it might index up to million pages each day.

When you expect a SE to find and index information, it’s really searching through the index which it has created earlier and not really exploring the Web. Different SEs produce different rankings to same web pages for the same given keyword and the reason for this to happen is because not every search engine uses the same kind of algorithm as other search through the index.

Among the things that a SE algorithm scans for is the absolute frequency and placement of keywords on a website`s page, but it may also detect artificial keyword stuffing or spamdexing. And so the algorithms examine the method that pages link to other pages in the WebPages. By looking into how pages link to one another, a search engine can more accurately decide what a page is all about, and if the keywords of the linked pages are similar to the keywords on the original webpage.