About
Founded in 2020, Black Lantern Marketing is a performance-focused SEO boutique agency working with global brands across iGaming, travel, and telecom. Their focus: solving complex technical SEO challenges through scalable, data-driven solutions, from search strategy and digital analytics to conversion rate optimisation and website creation.
The Challenge
For an agency managing multiple client portfolios simultaneously, rendering problems don’t stay contained. As with most agencies, the impact compounds fast: agencies don’t have the time or resources available to build individual SSR solutions for each client. And after noticing that JavaScript rendering errors were causing soft 404s and duplicate content problems across several high-value client websites, Black Lantern knew they needed a quick fix.
One of these clients was a JS-heavy travel platform offering custom European itineraries, Go Real Travel. Despite strong content, key pages weren’t being indexed correctly. Googlebot struggled to render the site’s JavaScript, resulting in soft 404s, misinterpreted duplicates, and poor visibility for their main commercial pages.
Black Lantern’s team explored multiple potential solutions, including adjustments within Cloudflare and manual rendering optimizations. However, none fully solved the rendering inconsistencies or indexing challenges.
Through industry research, peer recommendations, and the SEO community, they discovered Prerender.io.
The Solution
After reviewing implementation options, Black Lantern integrated Prerender.io via Cloudflare: a straightforward, low-effort setup that required minimal engineering work.
The integration was completed within days, and within just six weeks, the team saw measurable improvements across key rendering and indexing metrics.
Their process included:
- Cleaning up canonical tags and eliminating URL parameter conflicts.
- Redirecting outdated page versions to main pillar pages.
- Refining headings and meta tags for clarity and uniqueness.
- Implementing Prerender.io to ensure Googlebot could access fully rendered HTML versions of each page.
- Adding structured data (Schema) to strengthen content understanding and search context.
Together, these optimizations helped Google correctly interpret and index the right versions of every key page on Go Real Travel’s site.
The Results
The impact was immediate:
✅ 100% elimination of soft 404s across key client sites.
✅ 80% improvement in indexing performance, restoring visibility to pre-issue levels and stabilizing organic traffic.
✅ Faster recognition of new and updated pages by search engines.
✅ Simplified maintenance across client environments thanks to easy Cloudflare integration and scalable configuration options.
What began as a technical fix became a foundational SEO improvement that elevated performance across multiple client portfolios.
From an agency perspective, Black Lantern found Prerender.io’s implementation straightforward, adaptable, and dependable across different client setups.
The team appreciated that Prerender.io required minimal setup, delivered consistent results across mobile and desktop, and aligned well with their technical workflows.
Integration was simple. We implemented it through Cloudflare, and it just worked. Within weeks, our rendering issues disappeared, and soft 404s were completely gone.
Looking Ahead
Prerender.io is now part of Black Lantern’s standard toolkit. For clients with JavaScript-heavy sites (particularly in industries like travel, iGaming, and telecom where dynamic content and search visibility are tightly linked), rendering reliability is no longer an afterthought.
The agency continues to deploy Prerender.io across new client engagements where complex rendering challenges intersect with organic growth targets, confident in an implementation that is fast, stable, and scales without friction.
And as for future clients, Black Lantern joined dozens of other agencies and signed on to become a Prerender.io partner. Now, thanks to a seamless integration, Black Lantern can offer immediate indexing, automatic SEO fixes, and more to their clients—while earning recurring revenue while they’re at it.
Interested in becoming a partner yourself? Get in touch below.
