HOW TO DEFINE COMMUNICATION OBJECTIVE?
You can gather your project team and brainstorm ideas. Try to answer questions: What do you want to achieve with each specific message? Which topics would attract young volunteers to participate in youth mobility?
For example, we are aware that young volunteers are interested in helping, gaining valuable experience, developing their skills and contributing to society. So, in one of your messages, you can highlight the development of skills and contribution to society through volunteer work to attract new participants.
If you want to be more specific you can add some goal numbers you wish to reach. For example, highlight contribution to society to attract 5 new participants to your youth mobility program. However, have in mind that goals need to be realistic, do not overestimate your possibilities. Remember: do not confuse communication objectives with those of the project itself.

Here are few examples of some general communication objectives you can use in your strategy:
Raise awareness and generate knowledge about youth mobility
Motivate young volunteers to take part in mobility program
Inform volunteers on how they can participate in youth mobility activities
Engage young volunteers to actively participate in social media post about specific mobility