Malware stands for "MALicious softWARE" such as viruses, trojan horses, and spyware.
Malware can come in emails, texts, pop-ups, and other links.
How to avoid it
There are several ways to avoid malware, they most effective and common ways, however, are anti-virus software, a firewall, and just plain common sense. Another good way to avoid Malware is to do RESEARCH about fraud, companies, items, etc.