Being second largest network with more than 800 million users, Facebook has almost got more than 40% of total internet users. Current Internet generation from every basic internet user to tech savvy use Facebook for their virtual social life.
You have Facebook account but Facebook login credentials are not only applicable within Facebook. You can use these credentials to login into third-party websites. There are more than a million websites where you can use your Facebook account to login. You can know these websites with these types of Facebook buttons.
If you want to save your time and login with your Facebook account then you need to click those buttons which pop ups new dialogue box asking your permission (Facebook will ask your username and password if you are not logged into Facebook yet and later asks your permission).
Once you click “Allow” button, you will be logged into that website. That’s all.
This process of registering into other websites with Facebook account is very easy and time-saving. You are not bothered to fill up your name, address and other data every time you want to register into new website. Similarly, this process is secure too. You don’t need to worry to get your Facebook account hacked using this method.
This process is so easy that, once you allow such websites to access your Facebook profile information, you don’t need to login every time you visit these websites. When you are logged into Facebook already then you are logged into all these websites at once. There will be no problems and security issues (i.e your password will be safe) using this method and you can use any website like normal user.