The trailing twelve months (TTM) is the most recent twelve months of results, the period a buyer prices a business on.
In a sale
To see the direction of the numbers as well as their level: a business whose results improved steadily through the year tells a different story from one whose best month was a single large order. Buyers read those months alongside the last three years and check them line by line in diligence. A change that will matter to a buyer has to show up in them, which is why the time to start the conversation about a sale is now.
Where it comes up
The Go-To-Market Analysis (GTMA) builds the file a buyer would build on your business, before a buyer does.