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"Por lo tanto" is a phrase which is often translated as "therefore", and "entonces" is an adverb which is often translated as "then". Learn more about the difference between "por lo tanto" and "entonces" below.
por lo tanto(
pohr
loh
tahn
-
toh
)A phrase is a group of words commonly used together (e.g., once upon a time).
entonces(
ehn
-
tohn
-
sehs
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).