Google Analytics: This is a free web analytics service offered by Google. It allows you to track the number of visitors to your site, their behavior, and other data. You can use this data to identify trends and optimize your store for conversions.

Hotjar: Hotjar provides heat maps and recordings of visitors interactions with your website. This can be a great way to identify areas of your store where visitors are having trouble navigating.

Crazy Egg: Similar to Hotjar, Crazy Egg provides heat maps and recordings of visitor interactions with your website. It also offers a feature called “scroll maps” that shows you where visitors are scrolling on your site.

Google Search Console: The Search Console is a tool offered by Google which allows you to monitor your website's search performance. With it, you can track your website's search traffic, optimize your site for search engines, and fix any crawling errors.

SEMrush: This is a comprehensive SEO tool that allows you to track your website's performance, analyze your competitors, and identify keywords to optimize your content for. It also offers a feature to track your ecommerce metrics, like transactions and revenue

Piwik: Piwik is a free, open-source web analytics platform. You can install it on your own server, giving you complete control over your data. It offers similar functionality to Google Analytics, and the ability to view, filter and export data.

Google Tag Manager : A free tool that allows you to manage and deploy marketing and analytics tags on your website or mobile app. It allows you to add tracking codes and pixels to your website without the need to edit the code.

Optimizely: Optimizely is a website optimization tool that helps you track user behavior on your website, test different variations of your pages, and analyze the results to improve conversions.