How to determine the potential of a keyword in terms of traffic monetization for a given word?

Question

Search Engine Optimization

For example, the word pizza. I look in google planner for my region. Writes - the competition is low. Cost per click - from 10 to 30 cents. Display frequency - 10t - 100t.
Here I do not understand the point of competition. Does low competition mean few ad buyers? If so, does this mean that there is no point in promoting a site by this word in terms of generating income from traffic?
And in general, how to determine a standing key or not standing?

Answer 1

You got it right. It makes no sense to advance by the key pizza in Google, you won’t be able to make money on advertising because the click is cheap.