useful in Wingdings is ◆︎⬧︎♏︎♐︎◆︎●︎

Full of use, advantage, or profit; producing, or having powerto produce, good; serviceable for any end or object; helpful towardadvancing any purpose; beneficial; profitable; advantageous; as,vessels and instruments useful in a family; books useful forimprovement; useful knowledge; useful arts.To what can I useful! Milton.