Who are webspiders?
You may noticed the term “webspiders “mentioned at many places while dealing with website related topics such as SEO(search engine optimization). Example: ‘Web spiders play an important role in search engine optimization’. Have ever attempted to know what is it or who are they?
Actually, webspider is not an individual, it’s a programmed script that browses the World Wide Web in a methodical, automatic manner. And the process is known as web crawling or spidering. A spider visits Web sites and reads their pages. And other information in order to create entries for a search engine index. All the major search engines on the Web have such a program, which is also known as a “crawler” or a “bot.” Spiders are typically programmed to visit sites that have been submitted by their owners as new or updated.
Entire sites or specific pages can be selectively visited and indexed. Spiders are called spiders because they usually visit many sites in parallel at the same time, their “legs” spanning a large area of the “web.” Spiders can crawl through a site’s pages in several ways. One way is to follow all the hypertext links in each page until all the pages have been read.
Usually these programmes are made to use only once. But they can also be used for long term use. Crawler can be purchased on the internet, or from companies that sell computer software.
Why is it important to us?
If you are a blog owner or a website, it is important to consider our heroes, the webspiders. Webspiders search sites on the basis of some specific keywords. Including more and more keywords into your site grabs the attention of webspiders. They also look at the sitemap or index. Development of a compatible site helps you to ensure that spider can easily find and index your site.
Unfortunately not all spiders serve a good or valuable purpose on the Internet. While the search engine crawlers and many others use the information indexed by the web crawlers for good. There are those that try and obtain nonpublic information and use it for things you don’t want. The most common bad spiders have been those that obtain email addresses for spam.
Any time you sign up to a site with an email address there is a small risk that bad spiders could obtain your data. The quickest way to tell if a robot is good or bad is to see what impact it has on your website. If you are seeing more good results than bad; then you’re being visited by good robots. If you are getting more bad results than good it is a bad robot.
How it work?
When a search engine’s web crawler visits a web page, it “reads” the text, the hyperlinks, and the content of the various tags used in the site, such as keyword rich meta tags. Using these information gained by the crawler, a search engine will then determine what the site is about and index the information. The website is then included in the search engine’s database and its page ranking process.If a site is experiencing heavy traffic or technical difficulties; the spider may be programmed to note that and revisit the site again; hopefully after the technical issues have subsided.
How To Handle Bad Robots
There are a range of techniques that you can use to stop bad web crawlers from coming onto your site and stealing your data. For the purpose of safety, it is best to assume that any robot that isn’t related to a search engine is a robot that you don’t want to come to your site.
The two most common techniques are as follows:
Before people sign up to leave comments or anything else on your site; use a captcha page which means that a human (rather than a robot) has to type in data.
Develop new coding on your site:
By making changes to your htaccess files you can stop bad robots from crawling your site.