So, where are you going?
Answer in your own words. It searches properly — hundreds of queries, dates moved, airports swapped — and comes back with three ways to fly it and the reason for each.
How it works
Where from, where to, roughly when, and how much hassle you will put up with. “Somewhere warm in February” is a real answer. So is “anywhere, as long as it is under a thousand”.
Before it looks for anything better, it prices the trip exactly as you described it. That number is the baseline, and every claim it makes afterwards is measured against it. Without one, there is nothing to have saved you anything.
Dates moved a few days either way, nearby airports, one-ways paired into a cheaper round trip, carriers it knows fly the route. Hundreds of queries over a couple of minutes, not one.
The cheapest, the best value, and the one with the best hours — each with the reason it is on the list and what it costs you against the others. Then a link that opens the trip, filtered to that flight.
In numbers
How often it came back cheaper than that appears here once enough searches have run to say so honestly.
What it will not do
The fares are the ticket. Checking a bag is between you and the airline, and inventing a number for it would be worse than saying so.
The Book button opens the trip on Google Flights with the airline, stop count and departure hour already filtered. You book it there, with them, not here.
Every result carries the moment it was captured. A day-old search says so on its face, and you can re-run it in one click or have it watched for you.