If you use a lot of products and images on the page you need to optimize them. You can try https://tinypng.com/ service it could help you to reduce the size of the image up to %50.
The latest version of the theme has lazy loading for the carousel images, so it should the reduce the size of the page and page speed.
Install cache plugin, minimize and optimize CSS and JS. Read the beginners guide to setting up W3 Total Cache plugin https://premium.wpmudev.org/blog/w3-total-cache-settings/
Also, a very good plugin is WP Rocket, but it’s paid.
Contact your host and discuss it with them about server response time because at present it’s too long 3.2 sec.
In case you need professional help with site optimization you may contact wpkraken team https://wpkraken.io/?ref=8theme