Marketing sites and brand websites
Brand sites, product pages, landing pages, campaign microsites. Page speed has to be excellent and content is updated weekly or less. This is what Astro was designed for, and where the performance advantage shows up most clearly.
Brand sites Landing pages Microsites
High-security sites
Static HTML has no database to attack, no PHP to exploit, no admin login to brute-force. For brands that have been hacked before, or that operate in regulated industries where security is a board-level concern, the reduced attack surface is a real argument.
No database No PHP runtime No admin login Static delivery