Table of Contents
- Introduction
- Why website performance matters today
- Core Web Vitals and their role in the Google algorithm
- Changes in Google’s approach to website performance
- Website Performance audit process
- User data analysis
- Technical website audit
- The role of development in performance optimization
- Popular CMS platforms and website performance
- WordPress and page builders – performance limitations
- Modern web architectures
- Strapi and Next.js as an example of a headless architecture
- Technical methods of performance optimization
- Ecommerce performance
- Performance monitoring
- Summary
- Sources
Introduction
Website performance is now one of the most important elements of a digital marketing strategy. In practice, a website is often the first point of contact between a user and a brand. Its loading speed and stability directly influence user experience and, consequently, business results.
Just a few years ago, performance optimization was considered mainly a technical task handled by developers. With the evolution of search engines and the introduction of Core Web Vitals by Google, performance has become an important factor in evaluating website quality.
In practice, this means that the way a website is built, its technological architecture, and the quality of its code can affect:
- visibility in search engines
- user experience
- conversion rate
- effectiveness of marketing campaigns
Performance optimization is therefore no longer only a technical task. It is increasingly becoming an element of digital product growth strategy.
Why website performance matters
Website performance directly affects user behavior. Google research shows that users often leave websites that load too slowly. In the case of ecommerce sites, this translates directly into lost potential customers.
From a digital marketing perspective, website performance affects:
- bounce rate
- time spent on the website
- conversion rate
- advertising campaign effectiveness
If a website loads slowly or behaves unpredictably, users often leave before completing the desired action, such as purchasing a product or submitting a form.
Core Web Vitals and their role in the Google algorithm
Core Web Vitals are a set of metrics introduced by Google to evaluate the quality of user experience on a website. Currently, they include three primary indicators.
Largest Contentful Paint (LCP)
This metric measures the time required to load the largest visible element within the user's browser window. In most cases, this is a hero image, a large visual element, or a block of text. According to Google documentation, a good LCP result should be below approximately 2.5 seconds.
Interaction to Next Paint (INP)
INP measures how quickly a website responds to user interaction, such as clicking a button, opening a menu, or typing in a form.
Cumulative Layout Shift (CLS)
CLS measures the visual stability of a website during loading. If elements move unexpectedly while the page loads, it can negatively impact usability.
Changes in Google’s approach to website performance
Over the past few years, Google has gradually increased the importance of user experience in its search algorithms. The introduction of Page Experience signals and Core Web Vitals was one of the most important steps in that direction.
Data used to evaluate Core Web Vitals is partly derived from the Chrome User Experience Report, which is based on real user data from the Chrome browser.
Several clear trends can be observed in the SEO industry:
- increasing importance of real user data
- greater focus on website stability and interactivity
- growing importance of technical architecture
Website Performance audit process
Performance optimization should begin with an audit.
The audit process usually includes three main areas:
- user data analysis
- technical website analysis
- system architecture analysis
Only after understanding these elements can effective optimization actions be planned.
User data analysis
The first stage of the audit is analyzing data from analytics tools.
The most commonly used tools include:
- Google Analytics
- Google Tag Manager
- Google Search Console
This data helps identify:
- pages generating the most traffic
- pages with high bounce rates
- pages with low conversion rates
Technical website audit
A technical audit analyzes factors such as:
- page load time
- number of HTTP requests
- size of resources
- image optimization
- cache implementation
- CDN configuration
Tools commonly used for this analysis include:
- Google PageSpeed Insights
- Lighthouse
- WebPageTest
The role of development in performance optimization
In many projects, the most significant performance issues do not result from individual page elements but from the application architecture itself.
Typical issues include:
- excessive JavaScript usage
- inefficient API calls
- poorly optimized database queries
- lack of application-level caching
For this reason, effective performance optimization often requires collaboration between SEO specialists and both frontend and backend developers.
Popular CMS platforms and website performance
A content management system can significantly influence website performance.
Popular CMS platforms such as WordPress offer flexibility and ease of content management. However, in larger or more complex projects they may introduce performance limitations.
WordPress and page builders – performance limitations
Page builders such as Elementor, WPBakery, and Divi allow websites to be created without programming knowledge.
However, they often generate complex HTML, CSS, and JavaScript structures, which can result in:
- longer rendering times
- increased browser workload
- weaker Core Web Vitals scores
Modern web architectures
An increasing number of projects use a headless CMS architecture.
In this model:
- the CMS manages the content
- the frontend application handles data presentation
This approach offers greater control over performance and system architecture.
Strapi and Next.js as an example of headless architecture
One popular technology stack in this architecture combines:
- Strapi as the content management system
- Next.js as the frontend framework
The frontend can generate pages statically or server-side, which significantly improves performance.
Technical methods of performance optimization
Common optimization techniques include:
- optimizing assets (CSS, JavaScript, images)
- using a CDN
- implementing caching mechanisms
- optimizing rendering
Techniques such as server-side rendering or static site generation can significantly improve page loading speed.
Ecommerce performance
Ecommerce websites are among the most demanding in terms of performance.
Typical issues include:
- a large number of marketing scripts
- heavy product pages
- complex product filtering
Optimization of ecommerce platforms often includes:
- product image optimization
- JavaScript reduction
- database query optimization
Performance monitoring
Performance optimization is not a one-time task.
Websites evolve as new features are added, which is why continuous monitoring is necessary.
Commonly used tools include:
- PageSpeed Insights
- Lighthouse
- Chrome User Experience Report
Summary
Optimizing the speed and performance of websites is now one of the key elements of digital marketing strategy.
Effective optimization requires a comprehensive approach that includes:
- user data analysis
- technical audits
- code optimization
- modernization of application architecture
Companies that invest in website performance can improve both search engine visibility and user experience.
Sources