Though dynamic languages have become far more common in recent years (e.g., Python, Lua, PHP, JS, etc.), many static languages are still in-use today and learning how to work with them is invaluable (particularly for fields such as systems programming—where static languages are far more common).
When we say "dynamic typing", what people usually mean is that the programmer does not need to annotate the variable declaration with an explicit type. That is, in Python for example, you simply declare a variable that can hold any type of data. Put another way, in dynamic languages, variables do not have a type even though values might. In most static languages, we do not have this shortcut.