Nazca sits further south on the coast, past Ica and Paracas. The main reason to stop is the small-plane flight over the Nazca Lines, plus the Chauchilla Cemetery and the Cantalloc Aqueducts nearby. The planning question is whether your route has the extra day and transfer time, and whether the flight itself works for you.
The flight is the reason most travelers stop in Nazca. It is a short flight in a small plane with banking turns to see the figures, which is not comfortable for everyone. If motion sickness is a concern, that should factor into the decision before booking. [CONFIRMAR: operador, duracion exacta y precio del vuelo].
Nazca extends the Ica/Paracas coast route further south, which adds real driving time. It makes more sense in 10 to 15-day Peru itineraries with Lima and Cusco than in a short trip focused mainly on Cusco and Machu Picchu.
She checks how many days the coast section already has, whether the extra driving time competes with Cusco logistics, and whether the flight itself fits the traveler before adding Nazca to the route.