A case study refers to the analysis and examination of a real-life situation involving the creation, design, and promotion of a product or service through digital channels. This type of case study is typically used to understand the challenges and opportunities involved in the development and marketing of digital products and services, and to identify best practices and effective strategies for success.

Key elements of a case study of development, designing, and digital marketing might include:

1. Detailed analysis of the product or service, including its features, functionality, and user experience
2. Examination of the design and development process, including any challenges faced and solutions implemented
3. Analysis of the digital marketing strategy, including the channels and tactics used to reach and engage target audiences
4. Evaluation of the effectiveness of the digital marketing efforts, including metrics such as website traffic, conversion rates, and return on investment
5. Identification of key lessons learned and best practices for future development and marketing efforts

When conducting a case study of development, designing, and digital marketing, it is important to consider the following:

1. Ensure that data is collected and analyzed from multiple sources, including both primary and secondary sources
2. Use a structured and systematic approach to analyze the data, and present findings in a clear and organized manner
3. Consider the ethical and cultural implications of the development and marketing efforts, and ensure that they are aligned with best practices and industry standards
4. Offer practical recommendations for future development and marketing efforts, based on the insights gained from the case study analysis.