Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines by normal search results. SEO may target different kinds of search, including image search, local search, video search, academic search, news search and industry-specific vertical search engines.
A search engine is a piece of software that uses algorithms to find and collect information about web pages. The information collected is usually keywords or phrases that are possible indicators of what is contained on the web page as a whole, the URL of the page, the code that makes up the page, and links into and out of the page. That information is then indexed and stored in a database.
On the front end, the software has a user interface where users enter a search term — a word or phrase — in an attempt to find specific information. When the user clicks a search button, an algorithm then examines the information stored in the back-end database and retrieves links to web pages that appear to match the search term the user entered.
From 1993 to 1998, the major search engines that we’re probably familiar with today were created:
- Web Crawler —1994
- Lycos —1994
- Infoseek— 1995
- AltaVista — 1995
- Ask Jeeves — 1997
- Google —1997
- MSN Search—1998