If someone tells you that, it means your story is a series of episodes, or events very loosely tied together. The events may be interesting and entertaining but there is little character or plot growth from one to the next.
This is the “little Johnnie had never had such an exciting day,” scenario. A series of excellent adventures, adding up to nothing. No growth in character, no new understanding. No plot.
Look at it this way:
The king died – the bishop died – the queen died. Episodes.
The king died – the bishop died of a broken heart – the queen died by her own hand. A plot – a story.
Go for it.