This crash course delves deeply into the areas of social media marketing, local online marketing, and mobile marketing, analyzing the interplay of the three central pillars of digital marketing. It provides compact practical knowledge and demonstrates how you can unlock new potentials for your marketing strategy. All measures can be implemented without a large budget and without a specialized marketing team. You will receive a professionally grounded guide for effective digital marketing strategies. New in the 2nd edition: TikTok, new opportunities with Facebook and Google Ads, tools like the Creator Studio, Instagram Shopping, current tips for local SEO and local Facebook Ads, and new possibilities for mobile websites (Progressive Web Apps). Online work aids: Detailed guides for successful SoLoMo marketing, a questionnaire for the social media strategy, a template for simple web controlling to check social media successes, and a checklist to avoid potential pitfalls.