It will not make an assistant recommend you on demand. Nobody controls model output, and any firm that says otherwise is selling you something they cannot deliver.
It will not fix a business with no reviews, no photos and a phone nobody answers. Structured data makes you legible to machines; it does not make you the better choice.
It will not replace content, advertising or a competent web developer. It sits underneath all three and makes their work easier to find.
What it does do is remove the technical reasons an engine would skip you — so that when your name should come up, it can.
The standards this work is built on are public: Google’s structured data documentation and the Schema.org vocabulary. You are welcome to check our work against them.