Open Question: I am recieving housing benefit as i am out of work. Why do the council want to visit me at home?

I have been receiving housing benefit for 3 months now as I was made redundant from my job. My circumstances have not changed and I am still looking for work. I have received a letter in the post saying that the council will be making a home visit. Why is this? Please can you help? What will they need to see from me?