How to prepare your online store for Black Friday and the holiday rush

Black Friday and the run-up to Christmas are among the busiest periods in an online retailer’s calendar. Customers are actively looking for gifts, promotions and limited-time offers, creating an opportunity to increase sales, acquire new buyers and strengthen loyalty.

The seasonal figures cited when this article was first published illustrate the scale of the change: Polish e-commerce sales in December 2022 were reported to be more than 40% higher than in other months, while Black Friday traffic was reported to rise by approximately 70%. Whatever the exact level in a given year, stores must be ready for a rapid, concentrated increase in demand.

Success therefore depends on more than the promotion itself. The website, payments, fulfilment process, customer communication and support team all need to cope with higher traffic and greater expectations.

Challenges of the holiday shopping season

Sudden traffic growth and its effect on performance

Traffic can multiply during a major campaign or the final week before Christmas. If the infrastructure has not been tested for that load, pages may slow down or become unavailable — precisely when every lost session can mean a lost order.

Customer expectations for speed and security

Seasonal shoppers often make decisions quickly. Delays, unstable checkout steps or uncertainty about payment security introduce friction at the most important point in the journey. Performance and trust signals should therefore be tested before the campaign starts.

How can the store stand out?

Intense competition means that discounts alone may not be enough. A coherent campaign, a clear proposition and a smooth purchasing experience help the offer stand out. Our partner agency, Emperial, develops digital campaigns that combine creative work with measurement and commercial strategy.

Preparing the technical infrastructure

Hosting options and where they fit

1. Shared hosting: suitable for smaller stores with predictable traffic, provided that the plan has enough resources and the provider can respond quickly to an incident.
2. VPS (virtual private server): provides allocated resources and more control than shared hosting, making it suitable for growing stores with a well-managed server environment.
3. Dedicated server: gives one environment exclusive access to the server’s resources and extensive configuration control. It can suit demanding stores, but requires capable administration and a resilience plan.
4. Cloud hosting: can scale selected resources as demand changes and provides flexible options for resilient, high-traffic architectures. Scaling must still be configured and load-tested in advance.

Cloudflare: more than a CDN

Cloudflare can combine content delivery, caching and network-level security services. By serving eligible assets from locations closer to users, it can reduce latency and offload work from the origin server.

Its security features can also filter suspicious traffic and help mitigate distributed denial-of-service attacks. Configuration still needs to be tested carefully so that genuine customers, payments and dynamic store functions are not blocked.

Performance benefits

• Faster page delivery: caching, compression and correctly configured asset delivery can reduce loading time.
• Content compression: eligible responses can be compressed in transit, reducing the amount of data sent to the browser.

Redis: fast access to cached data

Redis is an in-memory data store often used for object caching. In a suitable e-commerce configuration, it can reduce repeated database work and improve application response times during busy periods.

Benefits for e-commerce

• Faster access to reusable application data: object caching can reduce repeated database work around catalogue and session-related operations.
• Better application responsiveness: an appropriate caching strategy can shorten response times for repeated operations.
• Lower database load: caching frequently requested objects can leave the database more capacity for genuinely dynamic work.

Optimising e-commerce page speed

Store performance affects the customer experience, conversion and technical search quality. Improvements should be based on real measurements from representative pages, devices and traffic conditions rather than a single headline score.

Specific optimisation steps

Image compression. Product photography is often one of the largest contributors to page weight. Resize assets to the displayed dimensions, select an appropriate quality level and use efficient formats without compromising the detail customers need.

• Image-optimisation tools:
  • TinyPNG or ImageOptim can reduce PNG and JPEG file sizes; always compare the output visually before publication.
  • Squoosh provides direct control over format, dimensions and compression settings.
  • Imagify can automate image optimisation in WordPress-based stores.
• Modern formats: consider WebP where it produces a smaller file at the required quality.

Read more about using WebP images.

Lazy loading. Defer non-critical images and media until the visitor approaches them. This reduces the amount of data and processing required for the initial view while keeping essential product content available.

• How should lazy loading be implemented?
  • WordPress supports native lazy-loading attributes, while suitable performance tools can provide additional control where required.
  • In custom code, use native browser loading behaviour where possible.
  • For more advanced behaviour, the Intersection Observer API can trigger loading as an element approaches the viewport.

Remove unnecessary scripts and code. Unused CSS, excessive JavaScript and third-party tags can delay rendering and interaction. Audit dependencies, remove what has no business value and load the remaining assets at the appropriate time.

• Code minification:
  • Minify production CSS, JavaScript and HTML where measurement shows a useful benefit.
  • Tools include Terser, Clean-CSS and HTML Minifier.
• File consolidation:
  • Bundle assets deliberately. Under modern HTTP, one large file is not always faster, so base the decision on the application and measurements.
• Remove unnecessary plugins: delete unused extensions and replace heavy components where they add little value.
• Load non-critical scripts without blocking the initial render.

Read more about website optimisation and development.

Protecting data during traffic peaks

High seasonal traffic can attract abuse as well as customers. Protect payment and personal data with layered controls, monitor unusual activity and ensure that the response plan is clear before the campaign goes live.

• HTTPS: use a valid TLS certificate across the entire store and eliminate mixed-content errors.
• Network protection: configure appropriate firewall, rate-limiting and DDoS-mitigation controls.
• Controlled updates: keep the CMS, plugins and custom components supported and current, using backups and regression checks.
• Monitoring: watch application errors, payment failures, administrative activity and suspicious traffic so the team can respond quickly.

Preparing for a higher volume of holiday orders

• Optimise the purchase journey: remove unnecessary steps, consider guest checkout and test the basket and checkout on mobile devices.
• Test payments and delivery integrations: verify successful, failed and interrupted payments as well as courier and parcel-locker flows.
• Plan stock and fulfilment: forecast demand, monitor availability and prepare a response for supplier or carrier disruption.
• Automate order updates: keep customers informed about confirmation, fulfilment, shipment and any delay.

Real-time analysis and monitoring

Real-time monitoring helps the team understand traffic, checkout behaviour and technical health during a campaign. Analytics can highlight unusual abandonment, while infrastructure and security monitoring can reveal errors, saturation or hostile traffic.

Define a small set of meaningful indicators before launch, such as response time, error rate, checkout completion, payment failures, basket abandonment and conversion. Review the results after the campaign so that the next seasonal peak starts from stronger evidence.