Understanding the nuances of various image formats and their technical attributes can be challenging, especially with the rise of web graphics. Image compression reduces file size without significantly degrading visual quality, and there are two main types: lossy and lossless compression. Pixel density refers to pixels per unit display area, while resolution is the total count of pixels in an image's width and height. Bit depth determines color information stored for each pixel, with higher depths allowing more colors but larger file sizes. Chroma subsampling reduces chrominance channels' resolution relative to luminance, affecting compression ratios and quality. Image formats like JPEG, PNG, WebP, and AVIF have different features and use cases, such as baseline and progressive loading, transparency, and metadata. Choosing the right format can significantly impact user experience by balancing image fidelity with file size, taking into account factors like pixel density, bit depth, and chroma subsampling, as well as privacy concerns related to metadata.