The valuation represents how much a company is worth, and can be expressed as either Pre-Money or Post-Money Valuation.
Pre-Money valuation refers to the value of the company excluding funding. It represents how much a startup is worth before receiving investments.
Post-Money valuation refers to how much the company is worth after receiving investments.
For instance, a company receiving a $1M investment at a $5M valuation is worth $5M pre-money or $6M post-money.