Home Audience Acquisition How Do Search Engines Work – Web Crawlers

How Do Search Engines Work – Web Crawlers

by Tanace Ton

In today’s digital age, having a website is essential for businesses to reach their target audience and generate leads. Search engines play a crucial role in making your website visible to potential customers, which is why it is important to understand how search engines work and how they present information to users who initiate a search.

Types of Search Engines

There are two types of search engines: crawler-based and human-powered. Crawler-based search engines use robots called spiders or crawlers to index websites and present information to users.

How Search Engines Work

Crawler-based search engines work by sending a spider to index a website. When a website is submitted to a search engine, the spider reads the content on the site, its Meta tags, and any links the site connects to. The information is then sent back to a central repository where it is indexed. Spiders periodically revisit sites to check for any updates to the information.

The frequency of spider visits is determined by the moderators of the search engine. Some spiders can index up to a million pages per day, creating an index that is similar to a book, containing a table of contents, actual content, and links and references to all the websites found during the search.

Search Engine Algorithms

When a user searches for information, the search engine is actually searching through its index, not the web. Different search engines use different algorithms to search through the indices, which is why different search engines produce different rankings.

One of the factors that a search engine algorithm considers is the frequency and location of keywords on a web page. The algorithm also checks for artificial keyword stuffing or spamdexing. The algorithms also analyze how pages link to each other, which allows the engine to determine what a page is about and if the keywords of linked pages are similar to the keywords on the original page.


Understanding how search engines work and the role they play in making your website visible to potential customers is essential for businesses looking to succeed online. By submitting your website to search engines, you can increase your chances of appearing in search results and reaching your target audience.

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