These flight search platforms are a starting point, not a complete solution for strategic planning.
They reflect prices, yes, but do not contextualize the reasons behind these prices.
If a flight to Florence costs 500 € in May, the tool will not say if it is due to an event like the Maggio Musicale Fiorentino or just the high season.
For maximum optimization, this information should be cross-referenced with event calendars and accommodation availability.
Relying solely on these tools is settling for the minimum when superior performance is within reach.