What is it and What Does it Look Like?
Spam is an unsolicited email or message. It can use up your bandwidth on your phone because spam is usually a SMS message. It also uses up a bunch of your time, because you have to sort through your important and unimportant mail. Spam is also a for Malware and Fraud to spread throughout your computer and your mail contacts.
How Can You Avoid Spam?
Spam can be avoided in many simple ways; one ways is to have a spam filter, Gmail has a fairly good filter. Also, do not reply to spam mail, if you click on the unsubscribe button on the bottom of the email, it just verifies that your email is a real email account. Lastly you could simply just make a spam email account, or a one-use email account.