The Pre-Raphealites (PRB) were a group of artists that used their forward-thinking to create art that would go against the academic art of the London Royal Academy of Art. The group was formed in 1848. These artists included: Dante Gabriel Rossetti, William Holman Hunt, John Everett Millais, James Collinson, Frederic George Stephens, Thomas Woolner, and William Michael Rossetti. The painting pictured is a painting titled Ophelia by John Everett Millais that was inspired by Shakespeare's Hamlet. These emerging artists wanted to paint the natural world. Their paintings were almost always inspired by the literature that they read. They were inspired by the nature around them and went back to a type of flattened type of art style instead of using the perspective that was being taught at school. I find these painters important for the Victorian age because they went against the more rigid and political paintings that mostly dominated the time period. They started a type of revolution towards more natural art during the Victorian era.
Source: https://www.bl.uk/romantics-and-victorians/articles/the-pre-raphaelites