Magento 2 extensions that are added to the Magento 2 eCommerce platform to extend their functionality and add new features.

These Magento 2 extensions are developed either by Magento itself, third-party developers, or the Magento community.

Some popular Magento 2 extensions include:

1. Magento 2 Google Tag Manager:

Magento 2 Google Tag Manager allows you to easily add and manage Google Tag Manager code on your Magento 2 store. 

This extension makes tracking user behavior, measuring conversions, and running marketing campaigns easy.

2. Magento 2 SMTP Extension:

Magento 2 SMTP Extension allows you to send emails using a Simple Mail Transfer Protocol (SMTP) server. 

This extension is useful for sending transactional emails, such as order confirmations and shipping notifications.

3. Magento 2 Stripe Recurring Payment:

Magento 2 Stripe Recurring Payment allows you to accept recurring payments using Stripe. 

This extension is useful for businesses that offer subscription-based services or products.

4. Magento 2 EU Cookie Law:

Magento 2 EU Cookie Law extension helps you follow the European Union’s cookie law. 

This extension allows you to display a cookie consent banner to your customers and track their consent.

5. Magento 2 Delivery Date and Time

Magento 2 Delivery Date and Time allows your customers to choose a delivery date and time for their orders. 

This extension is useful for businesses that offer same-day or next-day delivery.

6. Magento 2 B2B Customer Approval:

Magento 2 B2B Customer Approval requires approval for new customer accounts. 

This extension is useful for businesses that sell to other companies.

7. Magento 2 Pre-Order:

Magento 2 Pre-Order extension allows your customers to pre-order products that are not yet in stock. 

This extension is useful for businesses that want to generate buzz and excitement for new products.

8. Magento 2 RMA Extension:

Magento 2 RMA Extension allows your customers to request a return merchandise authorization (RMA). 

This extension is useful for businesses that want to make it easy for their customers to return products.

9. Magento 2 Payment Methods:

Magento 2 Payment Methods allows you to add more payment methods to your Magento 2 store. 

This extension is useful for businesses that want to offer their customers more payment options.

Conclusion:

Magento 2 Plugins can be installed from the Magento Marketplace or third-party websites. 

Once installed, extensions can be configured and managed from the Magento 2 admin panel.