I am currently working on a digital marketing and SEO project for a high-traffic e-commerce website. We are seeing a significant drop in search rankings due to poor Core Web Vitals scores, specifically regarding Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS).

We have already implemented image compression and lazy loading, but the LCP remains above 3.5 seconds on mobile. Additionally, our dynamic ad banners are causing layout shifts that affect the CLS score.

What are the industry best practices for improving these metrics without compromising the site's rich media content? Are there specific server-side optimizations or CSS techniques (like aspect-ratio boxes) that work best for large-scale marketing sites?

https://www.spiralinfotech.com/