Here's how to understand it:

* Sn: This is the symbol for Tin.

* IV: This Roman numeral indicates that Tin has a +4 charge in this compound.

* Cl: This is the symbol for Chlorine.

* ₄: This subscript indicates that there are four Chlorine atoms for every Tin atom.

Therefore, the compound is composed of one tin atom with a +4 charge and four chlorine atoms, each with a -1 charge, resulting in a neutral compound.