"To preserve those traditions" means to protect and maintain the customs, beliefs, or practices that have been passed down through generations, ensuring that they are not lost or forgotten. Full definition
We decided to preserve the tradition when we broke up. (housegoeshome.com)
He is most known for preserving the traditions of Italian wines into Felice Wine Bar in NYC. (fb101.com)
Cicero might legitimately be cited in a «conservative» context because he lived in a moment when everything was «going to hell» and he was trying to preserve traditions under siege at the crashing of his own civilization. (firstthings.com)