Price to Sales, is this a useful metric?

When would it be appropriate to use this as one tool to evaluate whether a company may be under/overvalued?

Best Buy has ~50 billion in revenue and a P/S of ~0.4, isn't this extremely low? According to https://pages.stern.nyu.edu/~adamodar/New_Home_Page/datafile/psdata.html, the average P/S for online retailers is 3.53. Would that indicate that Best Buy could be worth ~150 billion and its current 22 billion cap is extremely small?

Profit margin of 22% and a net income of 2.45 billion for the latest fiscal.

Can anyone chime in and give any insight on how this may be a “decent” way to look at a company or why this is a dumb measure?