Title tag, 15–65 characters The blue headline in Google results and the text in the browser tab.
One clear H1 heading One main heading tells search engines what the page is about. None or several is ambiguous.
Structured data (JSON-LD or microdata) Machine-readable facts - address, phone, hours. This is what puts a business in a map card instead of a plain link.
llms.txt or AGENTS.md for AI search Plain text files that tell ChatGPT and Perplexity what your business does. Almost nobody in Austin has one yet.