Knowing how to effectively deliver value requires you to understand your target audience beforehand so that you can appropriately develop the content that you want to display to your target audience. It is impossible to please everyone involved, which is why you need to know who your customers are (your target audience) so that your content is generally inclusive.
This will require you to conduct some research and gather information. Begin by identifying the age, gender, income level, education level, and location of your customers. Once you have this basic information, you must determine how they interact with the world. What do they read? How do they share information? This will allow you to tailor your webinars to your customer as well as advertise in the right locations. Again, this will take a little work on your part, but it is worth the effort.