Emotions play a big role on Instagram. A profile picture that triggers emotions can increase the likelihood that other users will interact with you. For example, a smile in your profile picture can trigger positive emotions in viewers.
For brand profiles, the profile picture is an essential part of the brand identity. The logo or a signature image should be used consistently in your profile picture to establish and reinforce your brand.
Your profile picture can provide insight into your personality and interests. Choosing an image that showcases your hobbies or passions can help connect with like-minded people and encourage interaction.