The OPERAS-PLUS Communication Strategy and Toolkit describes the communication goals and objectives of the project and wider OPERAS Research Infrastructure, as well as outlines the activities and tools that will be used to achieve them. It provides a framework for consistent and effective communication across all channels and stakeholders. The strategy includesmessaging, audience analysis, channel selection, and measurement and evaluation criteria. The toolkit, on the other hand, provides specific templates, guidelines, and resources for implementing the strategy. Overall, this Communication Strategy and Toolkit is essential for ensuring that all communication efforts align with the goals and effectively reach their target audience. This deliverable was approved by the European Commission.