It's tempting to file Core Web Vitals under "something the marketing team worries about for SEO." For B2B websites specifically, they matter for a more direct reason: a slow, janky site is one of the fastest ways to make a serious buyer doubt your technical competence before a single conversation happens.
B2B buying decisions increasingly start with unattended research — a prospect reading your site before ever speaking to sales. A page that loads slowly or shifts content around while they're reading it isn't a minor annoyance; for a buyer evaluating whether to trust you with their systems, it's evidence.
The good news is that Core Web Vitals improvements are usually concentrated in a small number of fixes: optimizing large images, deferring non-critical scripts, and reserving layout space for content that loads asynchronously. Most sites don't need a rebuild, just targeted attention to the handful of elements causing the worst scores.
Treat performance as a standing requirement in every design and development decision, not a cleanup pass done once a year. It's far cheaper to keep a fast site fast than to claw back performance after years of unmanaged additions.
