In market you will find it a great variety of tiles and its really confusing to choose the right won for the right propose.
physical you must understand that there are two types of tiles one is porcelain and one is vertified.
Porcelain tile is more porous compared to vitrified tiles.
Again vertified tiles are of different types as below:
Soluble salt
Glazed vertified tiles
Polished glazed vitrified tiles
Also there are many varieties comes under the three major categories.
You should always the vertified tiles. The categories you choose will depends on many things, like where you are going to use.
In bathrooms is better to go with matte finish while for bedroom and living room you can choose the glossy one.
Glossy tiles can give a better look to smaller room.