WOT basically stands for Web Of Trust, its a free internet security Add-on for your browser. With this add-on you can get the idea of the reputation of the website before visiting that site and this is how it makes web surfing secure in your browser. WOT is having a large community on internet in which the user rates websites and share their experiences about websites.
Ranking of the websites vary from very poor to excellent in four categories: trustworthiness, vendor reliability, privacy and child safety. This Add-on is available for Internet Explorer and for Firefox too. Firefox users may download it from this link: http://www.mywot.com/en/download/ff , while for IE users the link is http://www.mywot.com/en/download/ie
Just download and install this add-on and after that each link on supported websites & search engines will be ranked with a single colored icon and on hovering a mouse over those icons you will get the rating of the websites that will help you in browsing the web safely.