Identify Unique Visitor
I wonder what the best way to identify an unique visitor is?
I know that you can use his or her ip-address and set a cookie but what more aspects are there?
The thing is that I want to be able to identify the first time I saw a visitor in my system.
I would love to hear your thoughts and tips.
I will build any kind of software, bots, web applications, desktop applications, mobile applications - you will handle marketing and sales.