In summary, it's a designation that OTC Markets places on an OTC security to stop high volume in a stock. It doesn't stop the stock from trading, entirely. When it does happen, the major brokerages will not allow buys. 99% of "Stock Promotion" results in a CE placement.
CE placement = stock goes down. CE removed = stock goes up
If one can judge when this may happen, one can trade a stock for huge gains. There is no public information available as to when CE removal happens; however, one can judge when CE will be placed when one sees the "Stock Promotion" badge at OTC Markets for a specific security.
This stock had CE placed 2x for stock promotion. It is now cleared. Most likely the recent share offering will drop this lower.