It uses the schema.org vocabulary: Organization for the company, Service for what you offer, Article for an article with its author and dates, FAQPage for visible frequently asked questions.
It helps a search engine understand and disambiguate your brand entity. It does not oblige Google or ChatGPT to cite you, and Google says its AI features need no special markup.
What does harm: inventing. Ratings that do not exist, awards, false addresses or identifiers. The markup has to describe what the page shows, nothing more.