AND-OR 功能有何作用？请选择所有合适选项。

The AND-OR functionality in LinkedIn Ads allows for both narrowing and expanding your target audience. Using "AND" conditions (e.g., "Job Title A" AND "Skill B") narrows the audience because a member must meet all specified criteria. This is useful for precise targeting. Conversely, using "OR" conditions (e.g., "Job Title A" OR "Job Title B") expands the audience because a member only needs to meet at least one of the specified criteria. This is helpful for reaching a broader but still relevant group. Testing different ad creatives is a separate function of A/B testing or campaign optimization, not directly related to the AND-OR logic for audience definition.