Why performance comes first for a startup
You need to know whether people buy before you spend on making them aware. Performance media answers that fast and cheaply at small scale.
Spending on brand before product market fit is how startups run out of money looking sophisticated.
The signal to shift
Rising cost per acquisition on a stable product is the signal. It means you have exhausted the people already in market and now need to create demand rather than harvest it.
The other signal is flat branded search. If nobody is searching your name, every sale is being bought.
What brand spend buys
Cheaper performance. Brands with recognition convert paid traffic at higher rates and pay less per click, because relevance and click-through both improve. Brand and performance are not competing budgets, one subsidises the other.