It is a picture of wood glued to particle board. A thin one - under a millimeter. 
Up close it does not look as realistic as it does on the website. It also appears to be darker. 

From a few feet away the table looks nice though. Rustic. It does feel solidly built and should last, if one takes care not to scratch the surface. 

Took over 4 hours to assemble. Had to move upstairs piece by piece - the box is quite heavy. Weight does not mean any part of it is real wood  though.