What does a spellcheck do?

Answer 1

It checks for suspected spelling errors and makes suggetions for fixing them. It can find things that may not actually be errors, like WikiAnswers would be seen as an error, and it may also pass over things that are errors. You could leave a letter out of a word and although it might not be the word you want, it cound create a valid word. So when you use it, always proofread a document. Use it to help you as one part of finding and fixing problems.