An adjective is basically a "describing" word - It tells us what something, someone or a place is like.
An adjective modifies a NOUN.
It describes the quality, state or action that a noun refers to.
i) Adjectives can come before nouns: a new car
An adverb simply tells us in what way, or how, something is happening or being done.
An adverb is used to modify a VERB, an ADJECTIVE, or another ADVERB.
Most adverbs in English are formed by adding -ly to an Adjective.