Advantages of Magento platform

Magento is one of the most famous and reliable ecommerce platform and if you're looking to start your online store then Magento will be a great choice.
Magento has large of advantages, few of them are:
1. A secured platform - Magento works very hard to keep the platform secured by announcing new improvements and updates.
2. Large number of extensions - You can get several extensions both free and Paid.
3. For any technical query, there is a Magento Stack Exchange.
4. You can get several Magento tutorials.
5. Large number of themes.

Hi! Here are a few more benefits of the Magento platform that you didn't mention:
1) Versatile Content Management.
2) Mobile-Friendly Configuration.
3) Advanced Search Engine Optimization.
4) Powerful and Spacious.
5) Built-in Upsells and Cross-sells.
6) Easy Third-Party Integrations.
7) Customize Security Permissions.

Also, in my opinion, you should use magento website maintenance if you have a website on CMS Magento, as these guys will be able to provide you with top quality maintenance services for your website.