"Link spam" refers to the practice of creating excessive or low-quality links on the internet to increase website visibility or rankings. It is a form of unwanted or irrelevant promotion that aims to manipulate search engine results. Full definition
In 2012, Google officially launched the «webspam algorithm update,» an algorithm specifically targeting link spam and manipulative link building practices. (searchenginejournal.com)
-LSB-...] link building techniques to preventing link spam to the pros and cons of competitive link analysis, SEO professionals have a lot to say about link -LSB-...] (wiep.net)
How Penguin works — The Penguin algorithm is a search filter that depends on Google's frequent algorithm updates and attempts to penalize link spam and unnatural links. (neilpatel.com)