Product
Treating your site as a product means treating it as something you tend rather than something you finish. It's tempting to see a launch as the finish line, where the work is done and the team moves on, but a site that nobody maintains starts decaying the day it goes live.
Reframing the site as a product changes how you plan. Instead of a one-time implementation with a hard ending, you set up for the long haul: a roadmap of improvements, a product owner, and steady updates.