Object Detection
is a computer technology related to computer vision and image processing that deals with detecting instances of semantic objects of a certain class in digital images and videos.
Object detection is an extension of image classification. It not only tells us if a certain object is present in the picture, but also tells us where. Comparing to Classification with Localization, object detection can detect multiple objects in an image.

Useful Resources:
Edge Impulse FOMO (Faster Objects, More Objects) is a novel machine learning algorithm that brings object detection to highly constrained devices which lets you count multiple objects and find their location in an image in real-time using up to 30x less processing power and memory than MobileNet SSD or YOLOv5. Link