When a WordPress website feels slow, the common reaction is to install another optimization plugin. That can help in some cases, but it can also add another layer without addressing the actual bottleneck.
Start with page weight. Large images, background videos, multiple font families and oversized sliders can make a page expensive to load before WordPress itself becomes the main issue. Compress media, use appropriate dimensions and remove decorative assets that do not provide enough value.
Then review scripts and plugins. A plugin may add JavaScript or CSS to every page even when the feature is used only once. Marketing widgets, chat tools, tracking scripts and third-party embeds can also increase loading and main-thread work.
Caching should be configured for the actual environment. Server caching, page caching, browser caching and a CDN can complement each other, but dynamic pages such as carts, accounts and dashboards need careful exclusions.
Hosting matters too. Optimization cannot fully compensate for an overloaded or poorly configured server.
The most reliable process is audit, prioritize, change, test and compare. Core Web Vitals are useful signals, but the objective is a faster real experience without breaking important functionality.