What’s a reliable way to get high-quality writing delivered from freelancers?

Asking for a writing sample is the most reliable way to assess a freelancer's writing quality before committing to a project. This allows you to directly evaluate their style, grammar, clarity, and ability to meet specific requirements, ensuring their skills align with your needs. Sending a list of keywords is a task instruction, not a quality assessment. Emphasizing importance is a motivational tactic, not a method for gauging writing ability. While these might be part of a broader hiring process, only a writing sample directly demonstrates their proficiency.