Your website is the most permanent piece of marketing your business has. Every campaign, every ad, every email eventually points back to it. And yet for most businesses, it’s also the thing that gets the least ongoing attention.
This guide covers what marketing managers need to know about web design — from understanding when a website is actually failing, to what good design looks like in practice, to how to know whether a redesign has worked.
What good web design actually means
Good web design is not about aesthetics. It is about whether your website does its job.
That means attracting the right visitors, communicating clearly what you do and who you do it for, making it easy for the right people to take the next step, and performing well enough technically that neither users nor search engines are penalised.
Most websites fail gradually rather than suddenly. A site gets built, launched, and then quietly deprioritised. Design ages, content stales, and the gap between where the website is and where the business is becomes impossible to ignore.
The fix is rarely just a visual refresh. More often it requires rethinking the architecture, clarifying the audience, improving the content, and ensuring the technical foundations are solid. Understanding which problem you actually have is what determines the right solution.
→ When and how to rebuild your website
What marketing managers typically get wrong
The most common mistake is treating web design as a one-time project rather than an ongoing investment. A website built in 2021 and left untouched will drift — not dramatically, but consistently. User expectations change. Competitors improve. Search algorithms evolve.
The second most common mistake is confusing symptoms with causes. A website that looks outdated is not necessarily failing because of the design. It may be failing because the content no longer reflects the business, because the CMS is so difficult to use that nobody updates it, or because the architecture was built around the old version of the business.
Discovery — properly mapping who the website is for, what it needs to say, and how users actually move through it — is the phase most agencies rush and most clients underestimate. Getting it right before any design work begins saves significant time and budget.
→ How to measure website success after a redesign
What makes a website perform well
Performance in web design means more than visual quality. A well-designed website:
Converts — every page has a clear purpose and a clear next step. Users are not left to work out what to do.
Loads fast — Google’s Core Web Vitals set the standard. Sites that fail these benchmarks see measurable drops in both rankings and conversion rates.
Works on mobile — over 60% of web traffic is now mobile. A site designed for desktop first is a site designed for the minority.
Can be found — on-page SEO is not an add-on. Semantic structure, clean URLs, properly implemented metadata, and fast load times all affect how well a site ranks.
Can be updated — a CMS that the marketing team cannot use will not be used. If updating a page requires raising a support ticket, the website will stagnate.
Good web design makes all of this possible without requiring technical resource to maintain on a day-to-day basis.
→ High converting landing pages — how to turn visitors into clients
→ UX copywriting — how text and design work together
→ Microinteractions and animations — how to elevate UX
→ Sustainable website design
Web design by sector
Different industries have different user expectations and conversion patterns. A healthcare website needs to communicate trust and make information easy to find quickly. A financial services website needs to establish credibility before asking users to act. The underlying design principles are consistent — the application varies.
The articles below go deeper on what good web design looks like in specific sectors, with examples and principles drawn from KIJO’s experience.
→ Medical website design
→ Financial services website design
→ Healthcare website design
If you’re a marketing manager looking for a web design agency in London, talk to KIJO.