Agencies often build beautiful sites that are heavy. Clients complain later when ads don't convert. Performance is not an afterthought; it's a feature.
1. LCP (Largest Contentful Paint)
Does the site load in under 2.5s? If not, 40% of users leave. My code minimizes CSS/JS blocking to ensure instant visual load.
2. CLS (Cumulative Layout Shift)
Does the layout jump around? That's annoying and kills credibility. I specify dimensions for every image and asset to guarantee visual stability.
3. INP (Interaction to Next Paint)
When they click "Add to Cart", does it freeze? I optimize JS execution so the site feels responsive, not sluggish.