3. Persuasive advertising is used to build demand. It is used when products are and competition is still entering the market. 4. Reminder advertising is used for products to maintain existing customer awareness and loyalty.

3. Persuasive advertising is used to build selective demand. It is used when products are established and competition is still entering the market.

4. Reminder advertising is used for mature products to maintain existing customer awareness and loyalty.

Explanation:

Persuasive advertising is a type of product promotion, where customers are attempted to be influenced to purchase a particular product in the presence of many other similar products in the  market. Testimonies by leaders and celebrities are used to convince that this product is superior to its competitors. This has selective demand because instead of providing a lot of information as informative advertising does, it is more deceptive and user-oriented. Its goal is to build selective brand preference by communicating a unique personal benefit to the consumer.

Reminder advertising is a marketing strategy where brief messages are sent with the objective of reminding a target audience about a particular product or service. This is used for mature products, which are already existing in the market and the business simply wants to ensure that it can maintain its competitiveness and that customers remember this brand even when new competition arrives.