Yes, Magento provides an event for customer account registration. It is available in version 2.2.2 and above and is called customer_register_success.
This event can be used to trigger specific tasks like a 'Welcome' email to the customer, add a coupon, create a customer attribute, etc., once the customer has successfully registered on the website.
To use this event, a consumer (a class which acts as an observer) must be created which will listen for the customer_register_success event. For example, if you need to send a ‘Welcome’ email to the customer, you have to create an instance of Magento\Customer\Model\Data\Customer to use the customer data in your listener.
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