which best describes the target audience of this advertisement - MARKETS
You must have known some marketing campaigns that fell off due to a lack of connection with the target audience. Also, maybe they weren't clear about or didn't know their ideal customers. "Which one is the best" is obviously a question format, so it makes sense that " which one the best is " should be the correct form.
Understanding the Context
This is very good instinct, and you could even argue that the grammar is good, but at best it's unnatural. Consider this sentences: This is the best ever song that I've heard. This is the best song ever that I've heard. Which of them is correct?
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Key Insights
How should we combine "best ever" and a noun in gen...