Yahoo has a feature that allows you to stay signed into the site for up to two weeks without having to enter your username and password every time you want to access your mail or other account features. This feature is convenient if using your home computer or one to which only you have access. However, if you enable the feature inadvertently on a public computer, others may be able to log in to your account and see private mails or data. Deleting Yahoo browser cookies disables the feature and forces you to enter a username and password on the next visit to the site. Tips Writer Bio

How to Get Rid of Cookies to Sign Into Your Yahoo - 26