SEO finding
The main image is lazy-loaded or not prioritised, or hidden slides load at once
SEO Warning Severity: Medium
Part of the audit Page speed and Core Web Vitals. Finding id: seo.heroImageLoading.
What it costs you
Hidden slides compete for bandwidth with the image the visitor sees, so the visible part of the page appears later.
What to do
Give images in slides after the first loading="lazy", or fetchpriority="low" if the carousel moves by itself.
What it checks
- Main image loaded too late on purpose
- Main image not loaded first
- Hidden slide images loaded too early