I hadn't recognized the importance of this document until you told me about it. ✬

The importance of music is underrated. ✬

The matter is of no importance. ✬

The matter is of great importance to me. ✬

This is considered to be a matter of great importance. ✬

This is a matter of the utmost importance. ✬

This is a matter of great importance. ✬

This matter is of great importance. ✬

He placed emphasis on the importance of education. ✬

Why do you attach importance to this incident? ✬