Abstract
Multimodal interaction refers to the combination of smart speakers and displays. It gives users the option to engage with various input and output modalities. When interacting with other individuals, humans use more nonverbal cues compared to verbal cues. They communicate with each other using a variety of modalities, including gestures, eye contact, and facial expressions. This type of communication is known as multimodal interaction. A specific type of multimodal interaction called human-computer interaction (HCI) makes it easier for people to communicate with machines. Several studies employing the aforementioned numerous modalities will discover that machines could quickly interact with a person by disclosing their feelings or actions. The research presented here provides an in-depth overview of multimodal interaction, HCI, the difficulties and advancements encountered in this field, and its prospects for future technological improvement.