One of the advantages of choosing Magento as a platform is the number of extensions that are available in the marketplace to add new features to your Magento store.
You can see a list of available extensions in the Magento Marketplace at https://marketplace.magento.com:
When you select an extension, you will see all the information that you need from the extension listing page, including:
- Available editions for the extension
- Available support by the vendor
- Installation service
- Pricing
- Description
- Current version
- Updated date
- Category
- Compatible Magento 2 versions
- Reviews
- Release notes
- Support
I recommend you to think of Magento Marketplace as a place where you can find three different types of customization for your store:
Besides these, the Marketplace is really intuitive and provides a really easy way to find the extensions that you need and review all the information for those extensions, including information about the vendor.
These extensions can be installed by a vendor, or by an experienced Magento developer who will review its code to integrate the extension in your Magento store.