What is the difference between standard deviation and standard error? Clarifying the nature of 'variability'

Standard deviation' and 'standard error'.The names are similar, and many people likely confuse them.Standard deviation is ...
Investopedia

Understanding Standard Deviation in Investment Risk Management

Ryan Eichler holds a B.S.B.A with a concentration in Finance from Boston University. He has held positions in, and has deep experience with, expense auditing, personal finance, real estate, as well as ...