I’m seeking free options only for improving my PSI score on an Oxygen site that uses minimal plugins (Oxygen, Enable Media Replace, User Role Editor, and SEOPress). I added Smush free and processed all of the images, but this has done almost nothing to improve the PSI score.
Hostgator added Endurance Cache as an MU plugin (which I reinstalled from a backup after WP Super Cache removed it, but now I have replaced it with Cachify). After adding Cachify, the site offers a quick load that feels snappy and the PSI score improved by about 20%, but it’s still about 60.
The home page structure is a Header/Footer template that contains JS code for the sticky header. Inside is a Main template inside featuring a commonly used Contact form (with custom PHP code in a code block). All pages use the Main template except the thank you page.
I’m not sure it’s worth giving more attention to this matter since I’m happy with the way the site feels, but I see people reporting PSI scores of 100 so I’m curious if I can do better. Any suggestions for actions I can take for free?