The three-click rule or three click rule is an unofficial web design rule concerning the design of website navigation. It suggests that a user of a website should be able to find information. It is based on the belief that users of a site will become frustrated and often leave.
Although there is little evidence that this is the case, it is a rule of thumb that is part of a good system of navigation. Critics of the rule suggest that the number of clicks is not important. 
In an outdated book, Taking Your Talent to the Web (2001), Jeffrey Zeldman wrote that the Three-Click Rule is “based on the way people use the Web” and “the rule can help you create sites with intuitive, logical hierarchical structures. “. 
The success of the test, which has shown that the number of clicks needed to access the desired information affects nor user satisfaction, nor success rate.  
In eCommerce Websites, the rules can be used to deter the use of the Internet.
- Jump up^ Testing the Three-Click Rule
- Jump up^ Zeldman, Jeffery (May 30, 2001). Taking Your Talent to the Web: Making the Transition from Graphic Design to Web Design . New Riders. p. 448. ISBN 978-0-7357-1073-3 .
- Jump up^ Myth # 2: All pages should be accessible in 3 clicks
- Jump up^ “Web Optimization: The Myth of the 3 Click Rule” . CMSWire . Retrieved 2012-08-21 .