The search engine will sort and compress all the information captured from the Internet through keyword descriptions and other related information, and then edit it into the index. Some of the captured information will be discarded after analysis if it is invalid. Only the information edited in the index can appear in the search results. Finally, the search engine analyzes the keywords entered by the user in front of the end user, finds the closest results for the user, and then arranges them from near to far according to the degree of relevance, presenting the working principle of the search engine. Simply put, the search engine spider finds the connection → crawls the web page according to the spider’s crawling strategy → then hands it over to the analysis system → analyzes the web page → establishes an index library.
What is a search engine spider and what is a crawler program?
The search engine spider program is actually an automatic application program of the search engine. What is its function? In fact, it is very simple. It browses information on the Internet, then crawls all this information to the search engine’s server, establishes an index library, and so on. We can regard the search engine spider as a user. This user visits our website and then saves the content of our website to his own computer. First of all, the search engine spider needs to find links. As for how to find them, it is through links. After discovering this link, the search engine spider will download the web page and store it in a temporary database. Of course, it will also extract all the links on this page, and then search repeatedly in a loop.