The first few seconds of your page look completely blank to visitors. A slow first impression is one of the top reasons people leave a site immediately and go to a competitor.
On WordPress
Use WP Rocket or LiteSpeed Cache. Enable "Delay JavaScript Execution" and "Preload" options. Move scripts to footer in Settings → Discussion.
On Shopify
Each installed app adds scripts that run before your page appears. Go to Online Store → Apps and uninstall anything you're not actively using. For scripts you do need, ask your developer to defer them so they load after your visible content.
Pro tip: Delaying non-critical scripts so they load after the page is visible is the fastest win. Most caching plugins for WordPress handle this automatically with a single toggle.
SiteSprout scans your site, tells you which issues you actually have in plain English, and keeps watch so nothing breaks silently.
Scan your site free