It is a group of words that is used to change the meaning of an adjective, a verb, a clause, another adverb, or any other type of word or phrase with the exception of determiners and adjectives that modify nouns
Example: Whether you like it or not, you have to go to bed now. If you pay your bills on time, you can have a good credit score.
In order for more youngsters to be able to vote, the Legislature should officially lead the nation and lower the voting age, so 16 year olds have a chance to vote.