Separate the platform from the discipline
A course on running ads inside one advertising system teaches an interface that will change. A course on positioning, offers and audience teaches something that survives the interface. Both are worth having, and the second makes the first far more useful, because most failed campaigns fail on the offer rather than on the targeting settings.
Notice who is teaching, and what they sell
Platform training is usually accurate about its own product and quiet about whether that product suits you. Agency and consultant courses often carry the opposite bias. Neither disqualifies a course; both are context. Each listing names the publisher, and where a course is built around one company ecosystem the summary says so.
Insist on the measurement half
Marketing courses that stop before attribution and analysis leave you unable to tell a working channel from an expensive one. Look for material that covers what to measure, how to read it and where the numbers mislead, not only how to launch a campaign.
Check how old the platform material is
Advertising interfaces, targeting options, privacy rules and tracking all change on the platform owner schedule rather than the instructor one. A course recorded two years ago can be sound on strategy and wrong on every screenshot. Where a provider publishes a last-updated date we record it.
Treat revenue claims as claims
This subject attracts marketing about return on ad spend, client wins and income. A course can honestly teach you a method; it cannot promise a result that depends on your product, market and budget. Where public marketing makes an outcome promise, that is exactly the sort of thing a verification examines.