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

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

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

MailChimp Sync for Prestashop customers and Newsleter subscribers . Automatically subscribe customers to your MailChimp list.

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

Display New Products in Home page Product page bottom and every page left right column with responsive and slider. Best module to Show New product's

All checkout steps appear together on a single page for customers to modify any step at once.Responsive and flexible checkout page designSupport All Payment Methods

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

This module allows creating any HTML and JavaScript code for the < head > and < body > section of your pages. It is very useful as it allows you to create any custom HTML code for different purposes and any chat and tracking script in head tag.

Newsletter Popup is a powerful and flexible module create lightbox popups that help you get more newsletter subscribers, promote new products, deliver special offers. 

Promotion Popup module displays an advertisement pop-up containing image and text on the website. If the user didn’t close the Ad manually then Ad will automatically close after a time interval set by you

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.