# Difference between light tail and heavy tail distribution [duplicate]

I read numerous websites including wikipedia on heavy and light tail distributions. However, I am not quite understanding the distinction between the two. In some sources, it notes that light tail distribution has uniform distribution while heavy tail has a larger distribution. Hence, I am led to believe that heavy tail distributions are just distributions with greater variance than light tailed distributions. Are there more nuances to this understanding? Can someone elaborate on this concept?