there·fore 
/ˈðeɚˌfoɚ/ adverb
/ˈðeɚˌfoɚ/ adverb somewhat formal : for that reason : because of that
▪ The cell phone is thin and light and therefore very convenient to carry around. ▪ Payment was received two weeks after it was due; therefore, you will be charged a late fee.
▪ The cell phone is thin and light and therefore very convenient to carry around. ▪ Payment was received two weeks after it was due; therefore, you will be charged a late fee.
