I am confused beginner..

[Matt]

I cant speak for the services above but I have never seen a service that does the work for you, not effectively anyways. SEO (Search Engine Optimization) is a task that requires lots of work, but the concepts are simple.

Build pages that are relevant to what you are trying to sell. Make page titles that are relevant to page content. Consider using <h1> <h2> <h3> etc. tags in your source, and definitely do not spam or try to negate the search engines algorithms. Don't get blacklisted for trying to cheat, and using a low cost marketing service is probably going to yield zero to little return, and may end up doing more bad, than good.

Not that all low cost services are bad, but do your due diligence on the company and make sure the reviews are positive, and unbiased.

As a great person once said: "If you want the job done right, do it yourself."

...and if you don't have the time or patience for that, make sure the person doing it for you is qualified and has references, and a guarantee would help.