A brochure sits on a table. A website performs. If your site does not actively work for your business every hour of every day, it is not a website. It is a PDF with a domain name.
The distinction matters because it changes how you build. A brochure-site gets designed once, populated with copy, and forgotten. A performance-site gets measured, iterated, and held accountable.
Every page should have a job. Every section should move the visitor closer to an action. If a section exists because 'we need an About page', you have already lost the plot.
This does not mean every site needs to be a conversion funnel. Editorial sites, portfolio sites, and brand sites all have different jobs. But they all need to perform. The measure changes, not the expectation.