Deleting emails in Gmail will not necessarily give you more storage space. Gmail's storage is primarily based on the total storage quota provided by your Google account, which includes emails, attachments, and other data. Deleted emails often move to the Trash folder and continue to count against your storage until they are permanently deleted from there. To free up storage, you can empty the Trash folder and also consider archiving or deleting old and unnecessary emails, but this won't increase your storage quota. To increase your storage quota, you may need to upgrade your Google account or delete other types of data like Google Drive files or photos.