SearchGPT is OpenAI's AI search experience, which has been folded into ChatGPT's built-in search. Rather than answering from training memory alone, it retrieves live web results and cites the sources it uses, presenting a synthesized answer with links.
For brands, SearchGPT behaves like the search side of ChatGPT: being a source it retrieves and trusts for your category is what gets you surfaced and cited. The same content and authority signals that influence ChatGPT apply here.