Shower stools and bath seats help those who find it hard to stand in the shower, they allow you to sit whilst washing making it a safer, easier experience.
If you have a small shower then a wall mounted seat may be the answer as it will fold up against the wall when not in use, it is available with or without legs. A height adjustable round shower stool that has a padded rotating seat would be ideal again for limited space as you can sit and rotate to face the shower.