The Armed Services Vocational Aptitude Battery is a test that measures your strengths, weaknesses and potential for future success in four areas: verbal, math, science and technical, and spatial.

The ASVAB includes tests in 10 areas: 

1. General science (GS) 

2. Arithmetic reasoning (AR)

3. Word knowledge (WK)

4. Paragraph comprehension (PC)

5. Mathematics knowledge (MK)

6. Electronics information (EI)

7. Auto information (AI)

8. Shop information (SI)

9. Mechanical comprehension (MC) 

10. Assembling objects (AO).

Your score on the ASVAB test is used to determine your military occupation eligibility. Since enlistment bonuses usually are tied to your choice of occupations, the better the score, the more opportunities you have. It is impossible, though, to "ace" the ASVAB, so your goal should be simply to do your best.