You need to ask! And, when you ask, you can't just say "what is the objective"
You need to probe and come in with a view / options. So, a good way to ask would be: "It sounds like we've had some pretty rapid expansion in the past few years. What is our client looking to achieve by re-focusing on Warsaw? Has expansion perhaps been too fast and they're look for cost savings opportunities and efficiencies here?"
You need to be really clear on what the client is prioritizing or you're stranded out at sea! Are they looking for sales growth, pure profits, cost cutting, market share, beating out competitors, etc.?
If they say "we're looking for you to determine this", then you need to use your understanding of the context, industry, and business to figure out what should be prioritized