adverb, conjunction
furthermore; moreover; in addition; even more; still more
Adds information or intensifies a degree. As a conjunction, it links sentences or clauses. As an adverb, it means 'even more' or 'still more'.
この店は安いし、さらに味もいい。
This restaurant is cheap, and furthermore, the food is good.
さらに詳しい情報が必要です。
We need even more detailed information.