Spamming is something that is not good for website,blog or emails. when you receive a excessive amount of same type of information which make you worry. At same time Search Engine starts to penalizing your site too.
Spam is flooding the Internet with many copies of the same message, in an attempt to force the message on people who would not otherwise choose to receive it. Most spam is commercial advertising, often for dubious products, get-rich-quick schemes, or quasi-legal services. Spam costs the sender very little to send -- most of the costs are paid for by the recipient or the carriers rather than by the sender.
Doing an activity on bulk basis and using same content everywhere in the web is generally termed as Spamming. Its bad for seo and must be ignored. To get good and instant results, you must use unique and informative content.
Spamming is the sending of an unsolicited email. What this means is that you send an email, generally an ad of some sort, to someone who has not requested to receive that information from you.
Spamming is Violation of rules of any community or site.Posting a single message in different community is also Spamming.