Enable Caching...
"Each time someone visits your site, they have to download all your site’s files from your server. If you’ve enabled browser caching on your site however, that’s not the case.
Instead of pulling files from your server, they can store some of your files on their browser so the next time they visit your site, they pull the files from a local source.
Although visitors will have to download your site files the first time they visit your page, each subsequent visit—which can include refreshing the page or moving onto a new page—will mean a faster load time because they’ll be making fewer requests to your server.
If you’re tech-savvy, you can leverage browser caching by editing your HTTP headers and setting expiry dates on certain types of files.
If you’re not sure how to do that, you can use tools like the W3 Total Cache WordPress plugin that will do the work for you."
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Minify JavaScript and CSS...