What Is Web Design Best Practices 2019 and Why It Matters for Agencies

Web design best practices in 2019 represented a shift toward prioritizing user experience alongside aesthetics, with particular emphasis on performance, mobile-first design, and conversion optimization. This wasn't just about making sites look good—it was about creating digital experiences that functioned flawlessly across devices while keeping users engaged and moving toward business goals. The practices that emerged that year included mobile responsiveness as a non-negotiable foundation, fast page load times as a ranking and UX factor, accessible design that served users with disabilities, and clear information architecture that helped visitors find what they needed without friction. Voice search optimization began gaining traction, Core Web Vitals became a more prominent ranking consideration, and dark mode support started appearing as an expectation for modern sites. For agencies and web designers, understanding these practices meant recognizing that clients weren't just paying for a website—they were paying for a tool that had to work across multiple platforms, meet accessibility standards, rank in search results, and actually convert visitors into customers.

Why this mattered for agencies came down to client retention and competitive advantage. Agencies that built sites adhering to 2019 best practices delivered better results, which meant clients saw improved traffic, longer session times, and better conversion rates. This created a direct connection between following best practices and demonstrating ROI to clients. Agencies that ignored these practices found themselves building sites that didn't perform well in search results, had high bounce rates, or frustrated users with poor mobile experiences. This damaged client relationships and made it harder to win new business. The stakes were higher in 2019 because Google's algorithms had matured enough to penalize poor user experience directly—it wasn't just a nice-to-have anymore, it was a requirement for visibility.

Practically, agencies could implement these best practices by starting with a mobile-first design approach where everything was designed for small screens first, then enhanced for larger ones. This forced better prioritization of content and functionality. Performance optimization became a standard part of the development process rather than an afterthought, with tools like Google PageSpeed Insights and GTmetrix guiding specific improvements. Accessibility audits became part of project workflows, ensuring sites met WCAG standards and worked well with screen readers. Agencies also began educating clients about these practices during discovery meetings, explaining why certain decisions—like investing in faster hosting or implementing lazy loading for images—directly impacted their bottom line. Rather than presenting these as extra services, smart agencies bundled them into standard deliverables, making it clear that modern web design expected these elements.

For freelance web designers and smaller agencies, keeping pace with 2019 best practices meant continuous learning and tool adoption.