There are two kinds of soldering PCBs: through hole and SMD. Through hole uses components with leads, which are threaded through holes (hence the name) in the PCB and then fixed to the PCB with solder. SMD uses Surface Mounted components. That is, very miniaturized components that are soldered onto the surface of the PCB, without using leads.
Due to the small size of the components it is at first much harder to solder than for classic through hole parts. To save you from the misfortunes of failed projects, there are practice kits available. We will assemble one such example today and I will try to teach you the basics of SMD soldering as well as some more advanced tricks.