This article clarifies persistent SEO misconceptions about backlinks and Google's PageRank algorithm. Key insights: Google's system only assigns zero or positive link equity—not negative scores—meaning poor-quality links are simply ignored rather than penalizing a site. Toxic backlink reports from tools like Ahrefs often create false alarm; disavow links are rarely necessary for legitimate businesses. Purchased backlinks from low-quality sources waste money because Google recognizes their lack of organic traffic and contextual relevance. Social media links drive engagement but not domain authority. Actionable for Thai SMEs: stop spending resources on link removal and focus instead on quality content and natural links.