Internet marketing is a great way for wedding photographers to jump start their careers. If done properly, you can expect to achieve success rather quickly. If done wrong, your success rate will be much lower.
Their are hundreds of websites that cater to recently engaged couples. Finding the sites that will give you the best return on your investment is paramount. Check with other photographers to see where they are advertising. If a website has few photographers listed it could be a red flag. Too many on one site has its limitations too.
Most sites require signing up for one year. If the site does not produce any leads it will be a huge failure. Plus, you have wasted a full year on advertising that does not work. So, ask if they offer a 3 or 6 month trial. Another thing to consider is advertising in publications. Expect to pay much more for this type of ad.