The Cos4Cloud project aims to boost citizen science technologies to increase the quantity and quality of observations. The project is also an opportunity for networking among citizen observatories and an invitation to search for collective solutions for their sustainability. But how Cos4Cloud is going to achieve this? What are the services that the project is developing, and how will the citizen science community take advantage of them? Join the Cos4Cloud's upcoming webinar, and you will find out the answer to these questions and much more!