The Nuance Difference: "送ります" vs "役に立つ"

In Japanese, both 送ります and 役に立つ are often translated to English but have distinct usages. 送ります (おくります (okurimasu)) represents "to send, to escort" (Level: N5) and typically represents Polite form of 送る. On the other hand, 役に立つ (やくにたつ (yaku ni tatsu)) translates to "to be useful, to be helpful" (Level: N4) and is used for A set phrase meaning to be useful or helpful for someone or something. It describes the utility of an object, skill, or person. Often followed by the particle に. Mixing these up can sound unnatural to native Japanese speakers!