“What is the difference between a mole and skin tag?”

A skin tag is just a redundant piece of skin hanging off on a slender stalk. A mole, sometimes called a beauty mark or birth marks is a benign overgrowth of pigment producing cells. The two are completely different growths having nothing whatever to do with each other.

A skin tag is a benigh extension of skin and could be indluded w/n the classification of moles which are benign pigmented lesions that can rarely develop into malignant melanoma

A mole is generally pigmented, but doesn't have to be. A mole is composed of melanocytes. It can be flat, elevated, or nodular. It has a potential to become cancerous, and that's why dermatologists advocate an annual full body skin examination to check all skin growths. Nevi thst get excised are always sent for biopsy, so that they get examined under the microscope.

A skin tag is just a polyp; loose floppy skin on a stalk. Dermatologists can remove many of these in a session. They may or may not be sent for biopsy.

A "skin tag", medically known as an acrochordon, is a common, benign, pedunculated growth, usually found in areas of friction. (Around neck, under arms, in groin region etc.) They typically only require treatment when symptomatic.
A "mole", medically known as a nevus, is a growth composed of the pigment producing cells called melanocytes. They are usually pigmented, light to dark brown, and may be raised or completely flat. Some moles may be skin-colored and raised - and may be mistaken for a "skin tag". Moles by definition are benign, however they can progress into a serious malignancy - melanoma.
If you have any unusual, pigmented growths on your skin, have them evaluated by a dermatologist.

In general terms, a "skin tag" can be a MOLE. A mole can be used as a term for any brown or fleshy spot, but in general it's used for brown spots.