A convertible is a debt instrument whereby the person holding the debt has the option to convert it to shares of the company in which they hold the debt. Asher in this case lent BRGO $53K. Berge can pay them back with interest or Asher, after 6 months, can convert the debt to shares of BRGO(which they usually do) at 60% of the market price at the time they convert. This increases the share count of BRGO and dilutes the value of the stock.
Our hope is that this kind of finance is a thing of the past.