Your right in your definition, at least you have now been privilege in knowing what spamming is, when you sent an unsolicited message to a group of people or a single entity for no important reason or cause, its called spamming, also, spamming could also be this, if you have a good content in your post but made it in a wrong way, such could be by posting same content repeatedly over time.


It is expected that on tis forum, before you could create a thread, try make use of the forum search engine in other to check if what you're intending to post have been posted by someone before or not, secondly, some post contents are less important or meaningful, so they may not attract for much reply because members don't see the need for creating such a thread, lastly, some threads are just there to pass out information and not to engage a discussion, so expect such not to receive much response base on the content.


Low quality post is what we often regard under the off topic category, when a post content couldn't hold a specific information to learn or get informed about on, such could also be an improper content of a post for public viewing.