Theology means the study of who God isHere are some types of theology:
-Old Testament theology (This seeks to understand the theological message as given by various parts or the whole of the Old Testament. For example, "What do the Psalms teach about prayer?" or what can I learn about sacrifice from the Old Testament?)
-New Testament theology (This seeks to understand the theological message as given by various parts or the whole of the New Testament books. For example, "What does James or Romans teach about prayer?" or "What is the progression of the New Testament understanding on the doctrine of grace?")
-Historical theology (This traces the progression of Christians understanding of a doctrine throughout history. For example, the difference between Medieval and pre-reformation doctrines of salvation).
-Biblical theology (This traces the historical development of a doctrine. For example, the core doctrine of the Trinity as i made its way from Genesis 1 to the Council of Nicaea).
-Apologetic theology (This is the study of defending the faith. For example, how can we trust the Bible?)
-Systematic theology (This seeks to develop a clear, summarized understanding of a doctrine through the entire lens of Scripture. For example, "What does the whole Bible teach about the subject of sin?")