Meaning of static libraries and shared libraries in Android NDK.

Hello, I have a question because of the part I write in the Android.mk file when I port the library using NDK. There are times when I write include $(BUILD_SHARED_LIBRARY) Sometimes I write include $(BUILD_STATIC_LIBRARY). From what I understand, it seems to be called a shared library when there are more than two libraries within one application to build with NDK and one library is dependent on another. When you use one library alone, you use it as a static library. I wonder if this is right. Thank you.