What is bits per sampling??........Tutorial for arduino.

Bits per sampling .....FOR Reading sensor data with Digital pins ( like, DHT22 sensor data reading with Digital pin) . I couldn't find any tutorial for bits per sampling. Can somebody tell me about this?..........How can I use this with my arduino projects?.....Please make a video tutorial for this topic. I couldn't find any video tutorial on youtube either.

On previous form I find that you can't read value rather than 0 and 1 ......So tell me how DHT22 Or DHT22 send temperature and humidity Reading on DIGITAL PIN 2.

It's described in detail in the sensor's data sheet.