hi there,
To give an idea of the main areas in Dominican Republic, Santo Domingo, Boca Chica, Punta Cana, Playa Dorada and Cabarate are the main areas to stay on the island.
The capital of
Santo Domingo offers buzzing restaurants and bars and historical monuments so it is great if you are planning to see and do a lot of things.
If you're looking for a more relaxing vacation,
Punta Cana is a great as it offers all inclusive resorts and untouched beaches.
Hope this helps
Vacationbuddy