Mobile advertising is an effective option because 80% of internet users own smartphones, India will soon have over 200 million smartphone users, and most web traffic in India is from mobile phones. Apps are widely used for activities like gaming, social media, and shopping, and people value apps for their simplicity and convenience. While app-based advertising may not be suitable for all markets, it can be successful in developed countries and for targeting urban users in developing countries through in-app ads or branded games.