What is it about though?
i went to the site above and i found several different tests, which one should i take? the one i am interested in or all/most of them?
An A+ cert is a BASIC computer standardized knowledge test. Once you take and pass the test you'll be sent a diploma and an identification card to carry in your wallet supplied by COMPTIA. It's basically recognition that you've taken and passed their test.
They have a wide variety of course material, A+, Network +, MCSE (Microsoft Certified System Engineer), Cisco, etc. The downside is that even though you may have taken and passed the test, it doesn't necessarily mean that you can get a $40,000 salaried position two weeks after you've been certified. In today's maket, so many employers want a college degree and many require 1-3 years experience. Attending a tech school might put you in a position where you can serve as an intern and get some hands on real-world experience.