While most non-Muslims know of Ramadan for the fasting, charity is also an important part of the month long holiday.
Muslims are obliged to give charity on a regular basis in the form of either Zakat, which is mandatory giving, or Sadaqa, which is voluntary and meant to go beyond the mere religious obligations. During Ramadan, the rewards of charity are considered greater. As a result, many Muslims will choose to give more during the month.