Short answer: Since AI models like ChatGPT pull training data from the internet, to include your site in this data: 1) Robots must crawl your site (normal SEO). 2) Submit your site to AI indexes like ChatGPT (future feature).
The result: Google traffic will remain the main channel at 70-80%, but AI chatbot traffic from ChatGPT/Claude etc. will rise to 5-15%. You need to optimize for both.
Getting AI references: 1) Write high-quality, original content. 2) Include statistics, research, case studies (AI loves this). 3) Add an author bio (who wrote it). 4) Get your site into trusted databases (Wikipedia, industry databases).