How does price match for airline tickets work?

I know of no airlines or agencies that price match for tickets, or advertise that they price match. Or if they do, it will be for a specific time frame, ie, withn 24 hours of your purchase.
Airline ticket prices fluctuate so much it would b foolish for anyone to make an offer like that.

Emirates does. Etihad does. I think expedia does too.

Airlines do not price match to competitors.
Example:
Toronto - Montreal Air Canada is $450 but Westjet has it for $425

Airlines (some/ very few... as another poster mentioned Emirates) price match with online agencies
Example:
Emirates website Toronto - Dubai is $1500
Expedia is $1475
**usually the fine print is that it has to be a “published fare” (meaning anyone has access to this) and the fare class/ class of service / flight numbers must be the same. Some online agencies have net fares that are exclusive so likely nobody would price match**

OTA’s price match policy has similar elements to what I mention above ^^ but really truly varies.

Airlines price match their OWN tickets on OTAs. Emirates and Etihad I know for sure. Obviously no airline with price-match a different airline.

Here's an example.
https://www.emirates.com/ca/english/boo ... guarantee/

Price match and price guarantee are two completely different things.

Edit: Upon looking at your link it does seem like Emirates is a price match but it does clearly state how it works so I'm not too sure what you're asking for.