Metabolism speeds, fact or fiction?

Hi, so I always hear things about how to boost your metabolism. Not to mention, this article right here I was linked to today:
http://ultrafactspictures.com/15-ways-to-boost-your-metabolism?

I have also heard that metabolism-boosting is a weight loss myth and has no relation to how many calories you burn. Researching it myself it seems like having a "fast metabolism" just means that your body is faster at converting food into energy.

When they talk about "boosting", are they maybe referring to your BMR? Wouldn't getting fit through exercise, eating right, and increasing muscle mass by default increase BMR, and thus all these "boosting" tips are just weight loss tips?

Sorry if I sound confused or jumbled, because I am!

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