What does it mean if a stock issues warrants?

[frugal-one]

Stock is up 74% for the year and 20% in last trading. Not sure what warrants are?

[dado potato]

John Divine wrote a basic introductory article about warrants, linked below.

http://www.msn.com/en-us/money/savingandinvesting/stock-warrants-101-what-are-they-and-how-do-they-work/ar-BB15G7VR