Society & Culture & Entertainment Reading & Book Reviews

Cookies and Why Web Browsers Delete Cookies

A cookie is a piece of identifying data, typically created by a web server.
A website sends a cookie to a visitor's browser and stores it on a visitor's computer either temporarily (for that visit session only) or permanently on the hard disk (or until the visitor deletes them).
Temporarily stored cookies are called session cookies and those stored on the hard disk are called persistent.
Persistent cookies can identify a visitor as a new or returning visitor by storing a value that uniquely identifies each visitor.
If a visitor has been to the site before, a cookie is sent to the web server with the request for a particular page.
The web server checks for the presence of a cookie in the request and if it is not detected, the web server generates the cookie and sends it with the response to the visitor's browser.
When the visitor returns, the cookie is included in the request, the web server detects it and recognizes the visitor as a returning visitor.
The web server then writes it to the log file in the cs field.
Why Web Browsers Reject Cookies Whether web browsers are likely to accept a cookie strongly depends on whether the cookie is a first-party or a third-party one.
A cookie served from a domain other than the domain that your visitor requests from your website is considered a third-party cookie.
WebtrendsAnalytics 9 and SmartSource Data Collector (SDC) have historically used cookies as the primary method to obtain visitor information.
Tracking visitors accurately is paramount for confidence in your web analytics results.
Studies by leading analyst research firms such as Jupiter Research and Forrester have indicated that increasingly high-rates of cookie rejection and deletion by Internet users makes third-party cookies an unreliable method for collecting and reporting on web marketing results.
In fact, Jupiter currently believes third-party cookie rejection rates are as high as 28%.
Internet users commonly reject third-party cookies as part of their security measures.
Some of the most common reasons for the increase in the rejection of third-party cookies are: • Anti-spyware programs are designed to remove cookies that surreptitiously monitors visitors' web activities.
These programs often consider hosted web analytics services to be spyware and thus target their cookies for removal from your visitors' computers.
• Current browser technologies such as Microsoft's Internet Explorer and Mozilla's Firefox make it easier for visitors to reject third-party cookies.
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