Translation of enfocar

Thanks for the message. I hope that your friend here in England will soon be feeling better. If you decide to come at another time, I would be very pleased to meet you here. You can sleep at my place.
It is called Facebook viral marketing. I'm 62 and it's somewhat mystifying, but my two boys are using it continuously. What I'm a bit afraid of is the personal information they send to everybody. It has no privacy.
I understand your English, it's not bad at all. Yes, the English vocabulary is much larger than the German. The more you might spend time using the language, the better your vocabulary knowledge will become.