An open end is when the end of a dreadlock is left “un-dreaded” or “un-locked” allowing the original hair to remain free flowing.
Some people prefer this look, others prefer to “close” or “blunt” their ends. This is simply a matter of preference and does not positively or negatively affect your dreadlocks in any way.
“Some people really like their natural curls so they want open ends for their wispy curls.”