S.M.A.R.T. stands for Specific, Measurable, Attainable, Realistic, and Time-bound. With this criteria, you can see that your goal of wanting to ‘share your message with your audience’ is far too general and doesn’t fit the criteria.
A good example of a SMART objective would be something like this:
To deliver a highly persuasive sales presentation on your latest tech product that will increase sales by 50% within the next 90 days.