The effective use of a trademark guarantees its NON-revocation: it must guarantee the identity of the products and services for which it was registered.

The mark consisting of advertising slogans is a registrable trademark on condition that it has distinctive character, namely – regardless of its promotional meaning – on condition that it has something that allows the public to perceive it as an indicator of the commercial origin of the designated goods and/or services.

In case you want to register as a trademark a descriptive dialectical expression, you have to know that it is not allowed.