Let’s think about it this way. If you run a business and only make one transaction per day, chances are you won’t keep a record of those transactions because you can remember them. However, if there are hundreds of transactions in a year, or even in a single day, will you be able to remember all those transactions? A business makes a profit, but do you know how much you have earned or how much you’ve lost? After all, if we don’t keep the books, we can’t know the profit or loss. Those book records are called financial statements (balance sheets). You can do business without reading and understanding financial statements, but you’re just doing the hard-working, foolish thing without knowing the real content of the business. - Joseph’s “just my thoughts”
Even though a country's total population is decreasing, the economic situation could be improved by increasing the total economic activity of the remaining population after the decrease. Of course, there is a statistical population threshold below which this effect occurs. Nevertheless, this effect would not work in the case of a force majeure, such as a natural disaster or the outbreak of war, however, this assumption would be valid because a rapid population decline is a highly exceptional event that would not normally occur. Therefore, an increase in the economic activity of this population should be required during an economic recession. Applying this perspective, for building a solid relationship with your followers on Instagram, the number of followers is less important than the activity between them and you. This is called the "Engagement Rate (ER)". - Joseph’s “just my thoughts”