they use website statistics to determine their visitors' demographic and the time and day they usually log in
site statistics
are used to know when a site owner should publish new content and determine which content could affect more visitors
WordPress
1. Once you log in to your WordPress account, you are on the Reader tab by default. 2. Simply click on My Sites and from there you will see the statistics for your blog.
Facebook
1. In your Facebook page, a summary of the statistics will appear on the right side of your cover photo
2. Hovering your mouse pointer over Post Reach will give you more insights on which recent post reached the most people
3. Clicking on the Insights tab will give more in-depth statistics
Overview
contains the summary of statistics about your page
likes
contains the statistics about the trend of page likes
reach
contains information about the number of people who were reached by your post
visits
contains data on the number of times your page tabs (like the timeline) are visited
posts
contains data showing when (day and time) your site visitors visit your site
people
contains statistics about your audience's demographics (age, location, gender, language, and country) and the demographics of the people you have reached and engaged with.
demographics
refers to the statistics characterizing the human population usually divided by age, gender, income, location, and language.
reach: organic
your posts are seen through the page's wall, shared by users, and the news feed
reach: paid
your posts seen through paid ads
post clicks
number of clicks done to your posts
likes, comments, and shares
actual interaction done by your audience either through liking the post, commenting on it, or sharing it on their walls.