If you want to ensure that you are getting a quality search engine optimizations service, you need to check out the company first. There are many ways to do this. First of all you can look on the Internet, join webmaster forums and ask for recommendation. Another option is to look for a specific service, and find the company which is specialized in delivering those kinds of campaigns. That way you will minimize the risks, when you sign up for a long term contract.
Before you take on their services, ask for a site evaluation from the SEO agency. The content delivered will help you decide if their expertise is enough to achieve great results. You also have to check if they have testimonials from sites, similar to yours. The good knowledge of your niche will help setting up the successful SEO campaign faster. A free site review will also help you decide which services or packages to order.
When you contact the company, they should automatically offer a free consultation or evaluation. You can check out how good their customer service is, when you ask for further info. So you will not be disappointed later. The quality of customer support is very important when taking out a SEO service. You need to make sure that your questions are answered on time, and the company can keep the deadlines as well.
The initial review will give you an idea about the company, their packages, and expertise. Use it as an evaluation tool.