A slow website costs you visitors and search rankings. The good news is that most speed problems come from a handful of common causes, and they're fixable.
Start with your images
Oversized photos are the number one culprit. Resize them to the size they're actually displayed at, compress them, and use modern formats where you can.
Cut the plugins you don't use
Every plugin adds code that has to load. Remove anything you don't need and keep the rest updated.
Use caching
Caching stores a ready-made version of your pages so they don't have to be rebuilt for every visitor. It's one of the easiest wins for speed.
Trim scripts and fonts
Third-party scripts, tracking tools and extra font weights all add load time. Keep only what earns its place.
Choose decent hosting
Cheap, overloaded hosting can undo all the other work. Good hosting makes a measurable difference to how fast pages respond.
Measure, then improve
Run your site through a speed test before and after changes so you can see what actually helped. If the results look like a maze, that's what a performance tune-up is for.