Improving the quality of your Instagram profile picture is key to making a positive impression and strengthening your online presence. Invest time in editing and pay attention to brightness, contrast and colors. Stick to the recommended image size to ensure your profile picture is sharp and attractive.
There are many apps like Adobe Lightroom, VSCO and Snapseed that are good for image editing. Choose the one that best suits your needs.
It's advisable to update your profile picture occasionally to show your freshness, but don't overdo it.