The Advertising Handbook

I finished reading the advertising handbook finally, after borrowing it about a week and a bit ago, I learnt that there are a variety of ways to advertise, but you must always advertise to your marketing limit. From this I mean that to not advertise to heavily, so that the product runs out and that more people want it than they can produce. Depending which product I choose to advertise then I can decide how to advertise. If i choose a rare product then, the ideology would be to advertise to a small audience, to keep the product rare, like it is only for a specific social section or other target audience.