A discussion on Reddit involving Google Search Advocate John Mueller offers guidance on optimizing website performance and highlights the challenges of improving scores on Google’s PageSpeed Insights (PSI) tool. Mueller’s PSI Optimization TipsTo improve PSI scores, Mueller first recommends conducting a test to determine the impact of individual elements on your website. Mueller states:“What I usually do when I work on things like that is to simplify things on a noindex’ed test page as much as possible. Mueller explained that this indicates other limiting factors beyond images and videos if your test page doesn’t return the same score as your live pages. When aiming to improve PageSpeed Insights scores, try isolating webpage elements to evaluate their effect before applying the changes sitewide.