How do Search Engines Work?
Search engines do not really search the World Wide Web directly. Each one searches a database of web pages that it has harvested and cached. When you use a search engine, you are always searching a somewhat stale copy of the real web page. When you click on links provided in a search engine’s search results, you retrieve the current version of the page.
Search engine databases are selected and built by computer robot programs called spiders. These “crawl” the web, finding pages for potential inclusion by following the links in the pages they already have in their database. They cannot use imagination or enter terms in search boxes that they find on the web.
If a web page is never linked from any other page, search engine spiders cannot find it. The only way a brand new page can get into a search engine is for other pages to link to it, or for a human to submit its URL for inclusion. All major search engines offer ways to do this.
After spiders find pages, they pass them on to another computer program for “indexing.” This program identifies the text, links, and other content in the page and stores it in the search engine database’s files so that the database can be searched by keyword and whatever more advanced approaches are offered, and the page will be found if your search matches its content.
Many web pages are excluded from most search engines by policy. The contents of most of the searchable databases mounted on the web, such as library catalogs and article databases, are excluded because search engine spiders cannot access them. All this material is referred to as the “Invisible Web” — what you don’t see in search engine results.
The CR was so good that we carried some with us. It was almost 10:30 when we finished eating one of the best DBT. We bought the tickets and entered inside the park. We were very excited and in a real hiking mood. We entered the forest and continued to walk through the road. “Walking straight away through the road” was interesting but could have been better. We tried something different. After walking for some distance, we decided we need some rest and sat down for a while. Every one of us had our own style of taking rest. We climbed up to the Gumba and had some photographs there. 
The most interesting thing we had there was a couple of cups of special drink, special because it was free.
(guess what….?). We started the journey, which I would say, was adventurous. We thought we were the first hikers to climb that hill, which may or may not be the truth. Hands on hands, we were supporting each other in climbing the hill. Shiraj was getting weak but he accompanied. The rocks were getting stiffer as we elevated. At a point, the place was so steep that we could only see the ground meters down. We kept strong to the bushes and kept climbing. There was no room for slippery legs. The more we climbed up, the 
more adventurous the journey became. Thanks for a packet of biscuit that was providing Shiraj the energy to push forward. The approaching top was motivating us to climb more and the increasing difficulty was deteriorating our spirit. We were only about 20 meters shy of the top, when Shiraj declared he can’t continue. We could not force him as we know he was not fit and finally decided that we’ll complete the mission some other day.
