What Is SEO Link Building Strategy 2018 and Why It Matters for Agencies

By 2018, link building had evolved from the early days of directory submissions and reciprocal links into a much more sophisticated discipline. At its core, SEO link building strategy in 2018 meant acquiring hyperlinks from external websites that pointed back to your client's site. What made 2018 different was the emphasis on quality over quantity—Google's algorithm had matured significantly, and agencies had learned that one link from a relevant, authoritative domain was worth far more than hundreds of low-quality links from spammy sources. The 2018 approach focused on earning links through genuinely valuable content, building relationships with industry influencers and journalists, and creating assets that naturally attracted backlinks. This meant understanding which types of links actually moved the needle for rankings and which were essentially wasted effort that could potentially trigger a manual penalty from Google.

For agencies specifically, mastering link building strategy in 2018 was critical because it directly addressed client skepticism about SEO ROI. Clients could see links being acquired, understand why reputable sources mattered, and track rankings improvement alongside those efforts. Unlike some SEO tactics that operate in black boxes, link building was tangible—you could point to the actual domains linking to your client's site and explain why those relationships mattered for search visibility. Agencies that developed strong link building capabilities could charge premium rates because this was genuinely difficult work that required research, relationship-building, and often creative problem-solving. It wasn't something clients could easily replicate themselves, which justified ongoing retainer relationships. Additionally, agencies that understood link building well could differentiate themselves from competitors who simply stuffed keywords into content and hoped for results.

Practically speaking, agencies in 2018 started implementing link building through several channels that remain relevant today. Creating original research, case studies, and data-driven content that attracted media attention and citations from industry journalists was highly effective. Building relationships with complementary businesses, industry associations, and niche community leaders to secure natural link opportunities required sustained effort but paid dividends. Guest posting on established blogs in the client's industry was still valuable when done strategically—not just any blog, but publications where the audience actually represented potential customers. Agencies also leveraged the "Skyscraper Technique," where they'd identify popular content in a client's space, create something substantially better, and then actively reach out to people and sites linking to the original to suggest their improved resource instead.

The key insight for agencies was recognizing that 2018 link building required treating it as a core service rather than an afterthought. This meant dedicating actual personnel to relationship-building, having systems to track and analyze link opportunities, and understanding the competitive landscape around each client's target keywords.