The third step works on the sources the engines cite that you do not control, and on knowing whether any of it is working.
Earn mentions where real answers live: trade press, local press, the review platforms for your industry, community forums, and expert roundups. Ask satisfied customers for reviews that describe the work rather than the mood, because a review that says what was done is a review a model can use.
Then measure. Ask the major engines the questions your customers ask, record who is cited, and repeat every month. Share of answer against competitors is the number to watch. It moves more slowly than rankings, and it is worth more, because a citation in an answer is the whole first page.