White hat link building refers to ethical, sustainable strategies approved by Google — such as creating valuable content that naturally earns links, guest posting on relevant sites, and building genuine relationships with other website owners. Black hat link building involves manipulative tactics that violate Google’s guidelines, like buying links, using automated link farms, or participating in link exchange schemes purely for SEO gain. While black hat methods might show short-term results, they carry a serious risk of penalties, including a significant drop in rankings or complete removal from search results. Sticking to white hat practices ensures long-term, stable growth.