if you have a website you can use twitter to drive traffic to that site or just promote on twitter itself to direct CPA offers and make money
Advantages of twitter - It gives you exposure in your niche - It helps in conversing with audience - It allows you to promote your product / service - It allows you to provide support and get feedback for your product / service - It helps you in driving traffic to your website
Twitter is known for its' real time results. Some say those results are better than Google. Search yourself and find out what others are saying about your products, articles, and services almost instantly.