Well sweetie, in Christianity, angelology is the study of angels! You see, angels are like special beings that God created to help Him in different ways. They're kind of like messengers and helpers that carry out God's plans.
There are different types of angels, each with their own special job. For example, some angels are called Seraphim and they are very close to God. They spend their time praising and singing to God. Another type of angel is called Archangels and they are responsible for delivering messages from God to people.
Now, some people believe that there are also fallen angels, who used to be good angels but turned bad and rebelled against God. These are also known as demons and are considered to be evil.
Overall, angelology is just about learning more about these special beings and their role in God's plans. Some people even believe that angels can protect and guide them, so it's very important and interesting to learn more about them!