There are different types of Matzot, that people, according to their traditions and possibilities, might use for Pesach.
First, there is regular Matza and Matza Shemura. The difference between these two Matzot is the type of supervision (shemira) they have.
Regular Matza: Regular Matza is supervised during the process of mixing the flour with the water, and before: making sure that the flour was kept on a dry place (humidity can make the flour Chametz!) and that the water was at room temperature (warmer water will accelerate the process of Chimutz!) etc.
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