What SPAM means in easy word?

[montyauto]

Any one can describe what SPAM means in easy word?

[D.Koenemann]

Hi montyauto,

Spam is simply sending advertising email to people who have not asked for you to send them any information. The only way to safely avoid being accused of spamming is to only send your advertising emails to people who have signed up from your opt in form. The only other way is to send your ads out through safelists that you have joined. I hope this helps.

D. Koenemann