You can use one or more individual pixels depending on your goals:
- Individual Pixels: Each ad account should have its own pixel installed on the corresponding website. This allows you to track and optimize the performance of each ad account separately. Having individual pixels provides better control and insights into the specific campaigns and audiences associated with each account.
- Learning Phase: When you create a new campaign within an ad account, the learning phase typically starts from scratch. Facebook's algorithms need to gather data specific to that campaign to optimize its performance. While using a pixel with existing data can provide some insights, it doesn't automatically carry over the learning from previous campaigns. Each campaign needs to go through its own learning phase.
- Shared Pixel: Sharing a pixel across multiple ad accounts is possible, and it can be useful in certain cases. However, shared pixels are most commonly used for managing custom audiences that are relevant to multiple ad accounts. For example, if you have multiple ad accounts targeting the same customer base, you can create custom audiences based on pixel data and share those audiences across the ad accounts. This allows consistent targeting and messaging across the accounts.
In summary, it's generally recommended to have separate pixels for each ad account to maintain better control over tracking and optimization. While shared pixels can be useful for managing custom audiences, they don't automatically transfer the learning phase or optimize campaigns across different ad accounts. Each campaign within an ad account will have its own learning phase and requires data specific to that campaign for optimal performance.
