Often, e-mail accounts are flooded with messages from unknown sources or sent by well-known companies, without the recipient having given their address, without the identity of the sender being clear or the ability to deletions from the recipient list - this is the annoying one spam. There is a good reason not to be tempted to respond properly asking for your deletion!
Even if you have no intention of using them services offered in the “advertisement”, your response proves to the “Spammer”That this email address, yours, does exist and is actively used. This is because senders send messages to random addresses. If you answer, your address will be considered useful and you will see the number of spam mail that will be sent to you will increase significantly.
Alternatively, you can create filters that will delete them or automatically include messages from this sender to the unwanted ones - so keep a reservation and stay inspected with the Spam folder to delete them later.