Although it is often called a menorah, the majority of people during Hanukkah light what is called a hanukkiah, which has nine candle holders instead of eight. This extra candle, called the shamash, lights the other candles. It will be positioned a little above or below the other candles so it's clear which one it is. Some people choose to light one candle of the hanukkiah each night until all are lit on the eighth day. Aside from this, lighting the candles on the hanukkiah/menorah tends to follow a specific structure.
Via History, each candle should be put on the hanukkiah or menorah from right to left, as this is how Hebrew is read. However, the candles should be lit in the opposite direction, left to right. Specific blessings are said while holding the lit shamash prior to lighting any of the other eight candles. In total, 44 candles are needed. This is because a fresh candle plus the shamash is added each day to the hanukkiah and left until it has completely burned through. Most candle boxes sold specifically for Hanukkah will include this particular number.
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