Search engine works on a pre-defined set of rules. They have absolutely no manual control based on users since they tend to be text driven up to a certain point. It was tend to be as intelligent as the computer programs that have been developed by humans to do the job. The systems are basically computer process that works on the crawling method in the internet. Their role is to index webpages that they encounter and thenby process the search query in the best possible manner.
Aforesaid manner also calculate relevancy of the WebPages and retrieve information according to it. The main process of crawling employed by systematic process will monitor links from one page to another, starting with the one that is most popular. While indexing the contents of the page, it creates a list of words and selects the location where these words are found.
The index works like a database that is used for storing and future retrieval actions. Indexing also helps assign keyword to the webpage on which it is performed. When the index is created a particular weight is assigned to the same. Since the entire task is completed by a robot or spider, the only possible work executed by these SE is to make sure that it analyzes words or phrases within the webpage.
Since most of the internet content keeps on changing every minute, the task of indexing and crawling turns out to be a continuous process. The spiders are basically involved in the process to make sure that the topic works in the best possible manner. Algorithms used for the purpose of calculating relevancy differed from one to another. This is the main reason why different search engine gives different results for the same website.
Keywords play a vital role in SEO techniques since the website can be optimized in the best possible manner through the use of keywords that have been selected. Therefore, the selection of the right kind of keyword is important for the success of search engine optimization technique. If you want to make sure that your webpage ranks higher then it is important to make sure that it's keyword-rich.
Another important thing related to keywords is the density and relevancy to the search word. The positioning of the keywords on the webpage also offers better relevancy to the search word. It is important to understand that search engines are not capable enough to read. They simply detect patterns of words and letter to execute matching work as best as they can possible do.
From these patterns, they simply try to figure out the contents that must be existing on the webpage and rank the same in an appropriate manner. However, there is a need to make sure that you do not put a lot of keyword into your webpage. This will make the content more confusing for the SE spider thenby making it difficult to index your webpage. The main thing while adding content to the webpage is to ensure that the task is simple for the search engine spider.