Creating a data flow map requires you to identify the personal data collected, used, shared, and stored, define the data processing activities and their legal basis, map the data flows and data lifecycle, and document the data controllers and processors involved in each data flow. This includes any data that can directly or indirectly identify a person, such as name, email, phone number, IP address, location, preferences, etc. You should explain why and how you use personal data and what legal grounds you have to do so. Additionally, you can use symbols, colors, or labels to indicate the type, format, and sensitivity of the data as well as the encryption, anonymization, or pseudonymization techniques applied. Lastly, you should identify who is responsible for deciding and carrying out the data processing activities and what agreements or contracts exist with them. Note if any of the data flows cross international borders or involve third parties outside your organization.