There's more to it, but I've focussed on WordPress pages in the past.
Some things I'd start with:
- Minimize images (tinypng/tinyjpg)
- Deactivate/Remove what you don't need (Plugins (!!!), RPC, Emojis, stuff like that which is ON by default in WP -> will strip down the code)
- Strip down & combine scripts
- Reduce third-party dependencies, try making them first-party (fonts, analytics)
- Minify scripts and CSS
- Use caching on the client-side through htaccess rules
Normally those things are enough to get a 85+ score on Lighthouse, GTmetrix and alike.
Some things I'd start with:
Normally those things are enough to get a 85+ score on Lighthouse, GTmetrix and alike.