The pH scale range is from 0-14 with 7 being neutral. The closer you get to 14 the more basic the solution is and the closer you get to 0 the more acidic the solution is.
The lower the pH the higher the H+ concentration. A solution with a pH of 3 has a much higher concentration of hydrogen ions than the solution with the pH of 7. A solution that is basic, or has a higher pH, has more has a high concentration of Hydroxide ions OH-. Notice that if you combine a hydrogen ion with a hydroxide ion you get H2O, or water, which is a neutral pH.