Spam is basically putting information on a page that is unrelated to the page or general wiki content. This does not apply to userpages, as userpages are where a user may do anything they want with them (within reasonable limits. If it's NSFW, don't put it up.)
Common forms of spam include:
- Placing external links that have no related content
- Uploading pictures/files that have nothing to do with the wiki (except for use on userpages, but again, within reason)
- Inserting strings of gibberish into pages
- Blanking pages or sections of pages (unless you are rewriting it to sound better or be less confusing)
Please don't spam the wiki, as it is not fun to clean it up.