Letter of recommendation and details of achievements

In one of the letters of recommendation, the author wrote my achievements and the tactics that I used to achieve each one.
For example: Made the product profitable by doing X to save the cost of operations and Y to save monthly operating cost and Z to …

does that level of details is recommended in the letter of recommendations or just mentioning the achieved results?

@mmelsabry consider a task of writing recommendation letter akin to write a story. However, this story is special because it is about you. Anything that portrays you as a hero must be prominently hilighted and at the same time too much of micro details makes story boring. One needs to find a right balance in between. And needless to say that story has to verifyable through evidence and honest.