How I can achieve this effect in Photoshop? With what keywords I can search on Google?
There are probably a few ways to achieve this, but here's a quick and easy one that works...
- Place your city scape / scenery on the base layer.
- Place your image of the dude in the suit on the layer above.
- Change the blending mode of that layer to SCREEN.
This will only work if your image of the man in the suit has a perfect white background, otherwise you may have to do some tidying up of the outer areas.
I'm pretty sure this is known as double exposure. There's dozens of tutorials on Youtube about this kind of effect. Like this one: https://m.youtube.com/watch?v=pMMOnwCP4Ik