Other forms: interpretatively
Something interpretative is helping you understand or make meaning. When you visit a national monument, you might not understand the symbolism until you read the interpretative signs that explain and interpret the monument for visitors.
To interpret means "to translate or to explain." If you view an interpretative dance, the performers are interpreting the music with their physical movements. If you have a job working as an interpreter at the UN, you might have the interpretative task of assisting diplomats by translating what is said in one language into a language that another person can understand.