Regardless of people's ages, races, religions and most singles do so. In the short people, tall people, thin people, obese people do it. People from every developed country in the world to do so. Nice people do it, too. The reasons people join online dating sites are as varied as the people who join their membership, but primarily for three reasons: (1) Time (2) and money (3) Works.
Time: Finding good partner may be more difficult in real life, especially if your time is limited. Using dating sites, the screening is already done for you and you can go through hundreds of photos and profiles on-line research and condense easily. Be able to tell if a guy is looking for reports only occasional or long term. A lot of people who do not want to spend time meeting people only to find they are losers or jerks.
Money: For the price of an evening on the city you can enjoy an entire month of meeting men from the comfort of your home - is not in your jammies or sweats and with a beauty facial working its magic.
And it works: If you are honest, sincere, and ready to your profile, and jobs online dating for you. Try to make it interesting and fun while chatting with the men or women you meet online. Make sure you're ready to respond to email and be sure to be on time for any on-line.