Q&A: What are stock screens?

Q. What are stock screens and how do you use them? A. Let me give you a practical example. My family was going on holidays two years ago. We wanted to go to Portugal; we wanted to be near Porto; we wanted to be near the sea; we wanted an apartment with four bedrooms and we wanted a swimming pool; and we did not want to pay more than £2,000 per week for this very nice apartment. What did we do? We put all the requirements into Google and we did a search and out came 20 answers. Then we sifted through them. That essentially is the same with the screen. We have written our own Google sea...