This is a LDR Sensor. A photocell (also called a photodetector, CDS or photoconductive cell) changes resistance depending on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something).
GY6180 VL6180X Time of flight Distance sensor modulePREV10500
Wifi Hidden Camera Bulb 360 View Day/Night VisionNEXT15000