Should I put the markets for TV & Radio on my website?

Are you sure you want to possibly do that - collect or share that type information. Would changes be often in the Radio & TV markets?  Could this become price discrimination of sorts?  I'm not savvy about how your business works; I hope you can get greater information with others that are.  Good Luck!

To understand the question correctly, I'd need to know what your core business is, and what your objectives are. I'd also need to know the demographics of your customers. In general, though, I think it's better to be more inclusive with information. Clients appreciate the candor and openness of a business or vendor, and this generates greater trust, the core value needed to prosper. 

Yes you should! This will give them information that they are inevitably looking for from an accessible and efficient source! Also transparency is key to healthy network relationship building. 

What business are you in? Without that information an opinion will not mean much. I put little faith in Nielsen rankings

I don't know anything about these markets, but I would say yes. Unless there's a downside that you know of?

I’m not sure what your website is but I will say this. Stay in your neich. A website for s designed to drive traffic to your business.  Weather you offer a product or service. You provide value for you website visitors and your website will always be popular. No value no customers or traffic. 

I do not understand your question,

Agnes

I need more information in order to advise. There's no context in your question.

I'm not sure I understand the question. What is your business? I'd need to know more about your business

Yes, the more outlets use to promote your business is better for you. You need as much eyeballs as possible scoring out your products and services.