HOW ( ELABORATE IN 8 POINTS ) is advertising an effective tool to increase Sales? Discuss the ROLE OF ADVERTISING (GIVE 8 POINTS WITH ELABORATION FOR ROLE) being played in the economy ?

HOW ( ELABORATE IN 8 POINTS ) is advertising an effective tool to increase Sales? Discuss the ROLE OF ADVERTISING (GIVE 8 POINTS WITH ELABORATION FOR ROLE) being played in the economy ?