What to do if keyword ROI is low, is it worth investing in them?

Question

Search Engine Optimization

There are low-frequency keys, for example with a frequency of 100 or 50. The topic, for example, is recipes. Cost per click is low, competition is low. But as far as I understand, the cost of a click is an ambiguous matter, since it is a cost for advertisers, but it is important for me to get high-quality traffic. And yet I suspect that the cost of a click has some value.
But anyway, I would not want to write articles that will pay off for years. How to find the middle ground, so to speak, to weed out completely unprofitable keys. What is there to look at?

Answer 1

You ask questions to which it is impossible to give unambiguous answers without having worked on this topic for a decent amount of time. And those who know the answers are unlikely to share them, because knowing the answers is easy to make profitable projects.
Try and test - find out the answers to your questions.
I now have an international project, I have been working on it for a year and a half, I try, test, find answers to questions, and thus the project evolves and finds its audience. Without trial and error, there will be no development.