Twitter Lists is still not available to everyone. If your account is enabled to use Lists, you should see a massive banner advertising the service. The Lists feature will appear beneath your bio
Twitter Lists marks a step forward for the company in the realm of social networking. Lists will engage users to broadcast their groups of friends, suggest fascinating people, explore new hobbies, and more. It’s kind of like how Facebook organizes your friends into categories. The problem is that Twitter does not have a user search function, and to add people to lists, you need to manually go to their profile or sort through your “following” group and add them there.
Lovers of the microblogging service will surely drool as Lists receives a broader audience in the near future. Paired with other great Twitter tools, you can become an organized Twitter powerhouse.