When raising money, one of the main considerations is whether to use (a) Convertible Securities or (b) Preferred Stock.
Convertible Securities are a financial instrument that allow for an investment of cash in exchange for some amount of Preferred Stock in the future. In a Priced Round, the Company issues and sells Preferred Stock at a fixed valuation to raise capital. But in a SAFE or Convertible Note round, there is no fixed valuation. So if you want to avoid negotiating a fixed valuation for your Company and close faster for less cost, a Convertible Security is preferable.