Answer:
Correction for num 1:
What is the purpose of this propaganda? To convince people to buy products on their app.
2. Title of Advertisement: Nike
Type of Propaganda Technique: Bandwagon
What is the purpose of this propaganda? To persuade people to use or buy this product because everyone does it too.
3. Title of Advertisement: Kitkat
Type of Propaganda Technique: Repetition
What is the purpose of this propaganda? To let people familiarize themselves with their product.
4. Title of Advertisement: Sugar-Free Oreo
Type of Propaganda Technique: Card Stacking
What is the purpose of this propaganda? If the product is loaded with sugar or fat they brag their product that it is not loaded with sugar or fat.
5. Title of Advertisement: Nutella
Type of Propaganda Technique: Plain folks
What is the purpose of this propaganda? To convince the audience the spokesperson is humble and can trust the product that they're advertising.