For instance, there are many people at the present time interceding for a teenage boy who has a brain tumor which is cancerous. We are praying as led by the Spirit but also for specific requests which his parents send. We are praying united and focused prayer and praying in agreement together. Very concentrated and focused! Powerful!
There are also what I call arrow prayers where we "shoot" a quick focused prayer which the Lord puts on our heart.
I hope that helps answer your question. I could try to write more another time.