Move your website to a better host
moving your site to a better host is best practice when it comes to speed optimizing specially if these hosting works with SSDs and a better CPU
Using a Content Delivery Network (CDN)
Set of Servers disturbed across various geographical locations which reduct load upon one server and leads to speed incremental
Using of Images with large sizes reduce website performance specially when it comes to E-commerce websites.
so optimizing images and reducing it’s sizes helps in increasing website performance