SMS Marketing:

Sending promotional messages to customers' mobile phones via SMS or text (Genchur, 2023). It's a popular marketing channel because it has a high open rate and most people carry their mobile phones with them at all times. The SMS open rate range from 90-99%. SMS marketing can be used to send promotions, discounts, reminders, and other information to customers.

In-app advertising:

In-app advertising is the display of ads in mobile apps (Genchur, 2023). This can be used to promote games, products, or services to users who use the app. In-app ads can come in a variety of forms, such as banners, pop-ups, interstitial ads, and rewarded video ads. Advertisers can target their target market based on behavior, demographics, and other criteria to ensure that their ads reach the right people. 

Bibliography:

Genchur, N. (2023) 5 Mobile Marketing Strategies & Tools for 2023, GroundTruth. Available at: https://www.groundtruth.com/insight/mobile-marketing-strategies-and-tools/ (Accessed: March 14, 2023).