Availability is the first signal
A server response shows that an address responded at that moment. It does not confirm that visitors found the right content or completed their enquiry.
Test the journey that matters
Choose a commercial page, a contact path and information that must remain visible. Check mobile too. A theme, content or integration change can affect one step without taking the site offline.
Confirmation is not delivery
A form success message does not prove an email arrived. Check page confirmation and destination delivery separately. Avoid automated tests that create payments, bookings or unexpected messages.
Assign follow-through
An alert helps when someone owns it and can verify recovery. Start with a few important journeys and record what you observe. FlowUptime supports part of this monitoring work.