Why was drakes raid on Cadiz so serious?

Drake's raid on Cadiz in 1587 was serious because it targeted the Spanish fleet and their resources, significantly disrupting Spain's naval power and delaying the planned invasion of England. By destroying ships and supplies, Drake inflicted economic damage and showcased English naval prowess, bolstering England's position in the ongoing conflict with Spain. This raid also served as a preemptive strike that heightened tensions, contributing to the eventual outbreak of the Anglo-Spanish War.