What are the different paint finishes available for interior walls and how do they differ from each other?

The different paint finishes for interior walls are flat, eggshell, satin, semi-gloss, and high-gloss. They differ in terms of sheen level and durability. Flat finishes have no shine and are good for hiding imperfections but are less durable. Eggshell has a slight sheen and is more washable. Satin has a soft sheen and is easy to clean. Semi-gloss has a noticeable shine and is highly durable. High-gloss has a shiny finish and is the most durable and easiest to clean.