Solved Question about WiFi

I have two computers--a desktop and a laptop. On my desktop I have a router which I use for my wireless connection to my laptop. My internet service provider is Time Warner. Today I got a letter from TW which said that I am approved for free WiFi. I always am a little bit skeptical when someone tells me that I have been approved for something free of charge. So here are my questions: Do I need WiFi? What is the difference between it and what I now have? Does what I currently use--my router--give me more security than WiFi? My last question is, what in the heck is WiFi? I would appreciate it if someone would clear this up for me. Thanks.

I am pretty sure they are telling you that you have access to their wifi hot spots. Just look up where they would be, for example Starbucks and enjoy.

Wifi is the signal that your router gives out. So it looks like you already have wifi by means of your router. However like Jacer200 said, it sounds like there saying because you pay TW for your home broadband, you can connect anywhere around the country that has TW router that is giving out the TW signal. For example BT (UK) do Openzone. This means that BT customers can connect to any router that is giving out a BT openzone connection by entering a provided username and password. Hope this helps.

Thanks, that does answer my question.