How do you measure the impact of content marketing on brand awareness?

I don't know why people just liked the post and commented nothing. It's such a important topic. I would say the analytics placed on the different content and the right metrics to track. Ex: people pay insane amount of money on LinkedIn ads without knowing the needs like counting impressions. There could be many right metrics but I see these are the essential ones: 1. Video: Avg. view time, top-5 demographics, ratio of views/likes 2. Blog: Top-n contributing keywords, Avg. visit time per user, Traffic source (backlinks) There is much more to discuss on the topic.