Does white string around someones wrist mean anything?

Question

I askaed because Craig Ferguson is supporting one on his right wrist. The answer does not appear to fit him

Answer 1

The ethnic Lao ritual of the baci, in which strings are tied around a person’s wrist to preserve good luck, has indeed been elevated in Laos to the place of a national custom. The baci is associated with transitions, namely, giving birth, getting married, entering the monkhood, going away, returning, beginning a new year, and welcoming or bidding farewell to foreign guests. The practice has retained an important place in state ceremonies of all kinds. A prominent ritual among the upland Hmong is the sacrifice of a chicken or pig to the household spirit at the new year.