My background is in QA (quality assurance) as well as development – which means I think about testing very deliberately. Here's what that actually involves on a business website, and why it matters.
Functional testing
Does the contact form actually send? Does the confirmation message appear? Does anything break when you type something unexpected into a field? Every interactive element needs to be tested, not just viewed. A form that looks correct but silently fails is one of the most common and costly issues on live sites.
Cross-browser testing
A site that looks perfect in Chrome may have visual glitches in Safari, Firefox, or Edge. Testing across browsers – including mobile browsers – catches layout inconsistencies that no single browser will reveal on its own.
Responsive testing
Checking the site on DevTools is useful but not sufficient. Testing on real devices (actual phones, tablets) catches issues that simulated viewports miss – things like touch target sizes, scroll behaviour, and fonts rendering differently on actual hardware.
Performance testing
Running the site through tools like Lighthouse or PageSpeed Insights before launch catches obvious performance problems before they affect real visitors and search rankings.
Accessibility checks
Automated accessibility tools (like axe or WAVE) catch many common issues – missing alt text, low contrast, unlabelled form fields. They're a quick baseline check that should be part of every pre-launch process, not an afterthought.
Testing isn't a nice-to-have you add at the end. It's the thing that separates a site that works reliably from one that works in demo conditions but fails in the real world.