Ultimate super speed is a great module to install and forget about the page load speed issues and minimize page loading time, utilize server resource , save bandwidth and SEO optimization

Fix Serve Static Content From a Cookieless Domain And Keep-Alive Warning. in your website. One easy way to fix this warning is to use this module.

Optimize the natural SEO of your site on all search engines by this modules and you see what is SEO issue in your website products
Find comprehensive search engine optimization (SEO) tools for your site.

Prestashop Clean URL's - remove ID's language prefix from URL. PrestaShop Seo URL Module SEO friendly your website and removing auto generated IDs/numbers from URLs of your products, categories, manufacturer & other pages. auto redirects old URLs to new URLs

Minify HTML CSS JS is a very small and efficient extension. It will minify HTML including inline CSS and JS code.

Page load times can be significantly improved by asking visitors to save and reuse the files included in your website

Klarna Checkout is a complete online checkout solution designed to increase sales and customer loyalty, including Pay now, Pay later, and Financing options.

Demo : https://graceofsweden.se/module/klarnaofficial/checkoutklarnakco
in addon very high price see here : https://addons.prestashop.com/en/express-checkout-process/90132-klarna-checkout.html

Intercom.io customer communication platform with a suite of integrated products for every team – including sales, marketing, product, and support.

Fast and optimized pages lead to higher visitor engagement, retention, and conversions. Increase page load speed.
The Page Speed Module help you to get a passing grade in Google Page Speed Insight.

Google Tag Manager  module allows you to integrate Google Tag Manager on your PrestaShop site so that you can track and gather valuable visitor data from your website and make...

GA4  Google Analytics shows you the full customer picture across ads and videos, websites and social tools, tablets and smartphones. That makes it easier to serve your current customers and win...

This is the original Facebook Pixel module that helps PrestaShop store owners quickly integrate multiple fb pixels, add more pixel events and data, and optimize for more conversions. Facebook Pixels is great module.