For adults, 40 words per minute (wpm) is considered to be an average speed for typing. If you are applying for a clerical job, you sometimes see a minimum typing speed requirement for the position, so it is important to test your speed before applying. If you get as high as 100 words per minute without making errors, you are considered to have high speed.
Quite a few online games and tutorials exist to help you build the hand-eye coordination necessary to type quickly. Trying these sites out makes you a much more competitive candidate for office positions involving keyboarding and data entry.