What is the origin of the idiom "dab hand" and when to use it?

The exact origin of the phrase "dab hand" is uncertain, but it is believed to have originated in British English. The term has been in use since the 17th century and has its roots in the dialects of England. This idiom is used to convey that the person mentioned is highly skilled, proficient, or accomplished in their respective fields. It highlights their expertise and ability to perform the specific activity with skill and finesse.