Like with any objectives you set for your business, your communication objectives need to be SMART: Specific, measurable, achievable, relevant and time-based. Be specific in what goal you want to reach. Ensure you have the ability to measure your progress; creating a benchmark for your business goals will help. Be realistic in what you want to achieve, and make sure it’s relevant to your organisation and its aspirations. And finally, set a time frame (again, being realistic!) to reach your goal.
One thing to remember is to evaluate your communication strategy and its objectives. Assess what worked and what didn’t and use that information to improve in the future.