Serotonin
Unclaimed profileDigital Marketing Agency Manchester
Proven results with over £250m in client revenue. Explore our services ranging from e-commerce, brand strategy, social media advertising, lead generation, to content creation, and see how we've driven success for brands like Alberts Schloss and ASSOS of Switzerland. 100+ clients globally, we are committed to delivering impactful marketing campaigns that ignite brand growth and increase sales.
Web health
41/100
measured 22/10/2026
Issues found
35
on their own site
Reviews
0
from clients on Dr Urls
What Dr Urls found on serotonin.co.uk
From the audit of their public home page on 22/10/2026, worst first. Each links to what it means and how it is fixed.
- highLorem ipsum placeholder text detected
Lorem ipsum text is meaningless filler that provides no value to users or search engines.
- highMissing landmark elements
WCAG 1.3.1 requires that page structure is programmatically determinable.
- highTime to First Byte (TTFB) is slow
TTFB directly impacts all subsequent loading metrics.
- mediumCache-Control header missing
Proper caching prevents browsers from re-downloading unchanged resources, dramatically improving repeat visit performance.
- mediumDuplicate ID attributes found
Duplicate IDs cause label elements, aria-labelledby, aria-describedby, and fragment link targets to associate with the wrong element.
- mediumExcessive third-party resource loading
Third-party resources are outside your control and often add significant payload, blocking time, and unpredictable latency.
- mediumForm inputs missing associated labels
Unlabelled form fields are unusable for screen reader users, who represent a significant portion of potential customers.
- mediumForm inputs missing autocomplete attribute
WCAG 1.3.5 requires input purpose to be programmatically determined for inputs collecting user information.
- mediumImage missing alt attribute
Image alt text is the primary way search engines understand image content.
- mediumImages missing width and height attributes
Missing image dimensions are the leading cause of Cumulative Layout Shift (CLS), a Core Web Vital and ranking factor.
- mediumLink has empty anchor text
Anchor text is one of the strongest signals search engines use to understand the content of the linked page.
- mediumMissing canonical tag
Canonical tags are the strongest signal you can send to search engines about which URL should be indexed when multiple URLs serve similar content.
And 16 more. 3 security findings are not listed on this public page; the site's owner sees them in a full audit after claiming it.
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Figures on this page come from Dr Urls crawling serotonin.co.uk's public pages. Nothing here is taken from third-party listings.