Large images that haven't been compressed or resized can significantly slow down your site.
Every element on your website, from images and stylesheets to JavaScript files, requires a separate HTTP request. Too many requests can overwhelm your server and slow down loading times.
Your web hosting quality can significantly impact your website's speed. Shared hosting plans, which are often the cheapest option, can be slow because you're sharing resources with other websites.
While plugins can add a lot of functionality to your website, they can also slow things down.
Minification is the process of removing unnecessary characters from code, such as whitespace and comments. This can make your code smaller and faster to load.
Caching allows your server to store frequently accessed files, so they don't have to be retrieved from the database every time a visitor loads a page.