Search Engine Optimization is a changing field. At any given moment in time, companies that rely on the web for new business or customer communications will consume information about SEO and then rely on that snapshot for months or even years.
In the marketing mix, SEO is only one slice and company marketers are tasked with many other responsibilities. Wearing many hats does not leave much time to stay on top of SEO current best practices, let alone being able to test and experiment to uncover competitive advantages.
The snapshot of SEO knowledge taken months or years ago starts as a well intentioned premise, but without current information and best practices, can become outdated. Client side marketers and agencies that don’t specialize in search that rely on infrequent snapshots of information can end up unitentionally sabotaging the SEO effort.