Selected answers from the Dumb SEO Questions G+ community.
Moshe Mo: Actually less are better ... but to answer your question try a caching plugin like w3 total cache. This answer realy depends on your website type. What kind of site are you trying to optimize?
Moshe Mo: Micah Fisher-Kirshner then this plugin can fit you quite good. Be sure to check the right settings for your website/ theme, the internet has covered almost every available parameter in an understandable way (Y)
Lisa Brown: I use a combination of WP Rocket, Autoptimize, Cloudflare. What really moved the needle was switching to LiquidWeb`s WordPress hosting, the site had been on an older VPS. That combination gave 50% to 85% improvements depending on the page.
E Dieter Martin: Other than that a careful review of the site is in order. Google`s Pagespeed Insights can be helpful but some WordPress oddities make it hard to find the real culprits in the sea of messages.