Spam is unwanted messages sent in bulk - usually emails, but also texts or comments. Most are ads you never asked for; some try to trick you into clicking links or opening files that lead to phishing or malware. Quick explainer and examples: https://gridinsoft.com/spam
Spam wastes time and can hide real threats. One careless click can leak passwords, install spyware, or put money at risk.
Harvest: spammers collect addresses from leaks, scraped sites, or guess lists.
Blast: send millions of messages cheaply through botnets or throwaway accounts.
Bypass: evade filters with lookalike domains, URL shorteners, and attachments.
Profit: push scams, fake shops, malware installs, or credential theft.
Unknown sender or a brand that looks slightly off.
Urgent pressure to act now about packages, bank issues, or prizes.
Short links you cannot preview or attachments you did not expect.
From address does not match the display name or the real domain.
Let filters work: mark spam as spam, do not reply, and do not unsubscribe on obvious scams.
Never open unexpected attachments or enter logins from email links. Go to the site yourself.
Turn on MFA and use a password manager so stolen passwords are less useful.
Keep your email app and devices updated, and review junk folders for false positives.