Sometimes you may need to clear the cookies saved by your browser. Basically the cookies represent small text files, saved on your PC with information gathered from the websites you have visited. Usually the cookies are completely harmless, but sometimes your PC may be infected through a saved cookie. Also, if you make changes to your website you may not be able to see them until you clear your browser's cache and cookies.
Here are some basic instructions on how to clear the cookies of your browser:
Internet Explorer:
Tools -> Internet Options -> General -> Delete Cookies (under the Temporary Internet Files section)
Firefox:
Tools -> Clear Recent History -> Select time frame from the dropdown menu(if you wish all cookies removed - select Everything) -> Mark Cookies only -> Clear Now
Opera:
Tools -> Delete Private Data -> Details -> Mark Cookies only -> Delete
Konqueror:
Settings -> Configure Konqueror -> Cookies -> Management -> Delete all
Google Chrome:
Preferences -> Under the Hood -> Clear Browsing Data -> Select the time frame and check only "Delete cookies and other site and plug-in data" -> Clear Browsing Data
Safari:
Safari -> Preferences -> Security -> Security tab -> Show Cookies -> Remove All
It is a good idea to clear your browser's cookies on a regular basis.
