Email marketing is a digital marketing strategy in which businesses or individuals use email to introduce and convey their products, services, or information to potential customers or existing clients. Email marketing is used to engage customers, increase brand awareness, and promote sales by sending personalized messages to the target audience.

Cold calling is a marketing technique in which businesses or sales representatives reach out to potential customers via phone without prior consent to introduce and sell their products or services. This is done to individuals or businesses who have no prior relationship with the company or sales representative and is generally considered an unsolicited form of communication.

Spamming is actually similar to email marketing, but with one key difference – it involves sending bulk emails without permission to advertise your service and attract customers from there. Its purpose is precisely this, and you can do it by researching and using specific free tools.