Customers who use Google’s email service Gmail do get 15 Gigabytes of storage; that is a lot of space, but it is shared between multiple Google services including Gmail, Google Photos, and Google Drive. Google started to push its subscription-based service Google One in recent time. Customers who subscribe to it get increased storage and some additional benefits.
Google customers who don’t want to pay the company for extra storage may run into space issues eventually, especially if the account is used actively.
One option to explore when it comes to freeing up storage space is to get rid of emails that are no longer required.