Some spices need time to evolve their flavors (ripen, dry, etc) and some can be used fresh. Often in a different state of preparation, it can be called something else, another form of the spice.
Different spices add different taste to what you are cooking
Campari has a bitter and herbal taste with notes of citrus and spices.
Spices and seasonings.
Spices change taste depending on what spice they are. Some may add spiciness, others make it salty, sweet, bitter, sour or tangy.
Mask the taste with other flavours/spices
To make it taste good.
Refrigeration had not yet been invented, so the only way to preserve meat was to salt it. Adding spices helped to hide the salty taste. The spices also concealed the taste of meat that had gone bad.
you should use cooking spices
cause that makes it taste better
They made food taste better.
Yes most pastas taste the same . But If you put sauce or spices with it it will taste difrent . But Yes, pasta tastes the same . :)
There's no great mystery why people add spices and herbs to things. They taste good! It's as simple as that.