1. Post Reach is a measure of how many people actually view your post. Post Engagement measures how many people show interest in your post by clicking on it to learn more, liking your post, commenting, and/or sharing your post. 2. Just because your post reaches a lot of people doesn't necessarily mean that they are interested in it. By engaging with your post, it provides you with a better idea of the number of people who are actually interested in the content of your post. Reaching your target audience is important, but engaging your target audience is essential. If people who view your post see that there is a high level of engagement, that may compel them to engage as well. Engagement lets the poster know that their content, product, information, etc. is interesting to their target market. 3. Facebook Insights provides valuable information including age, gender, education, job titles, relationship status, likes, interests, hobbies, and more. On...