A neutral accent is a way of speaking a language without regionalism. It is usually used by VO actors and its purpose is to avoid people to focus on the accent and focus on the message, aiming a wider audience.
Due the size of countries, it is usual to have regional accents in the same country. In my country those are: andino, central, central-caraqueño, guaro, llanero, marabino (maracucho) y oriental. Sometimes don't you feel that it is difficult to understand people in your own country because of their accent? I do. How many regional accents does your country have?
I looked for 2 videos from a fellow Venezuelan comparing how do Spanish (LA) and English accents do sound:
English accents: (video is in English, examples in Spanish)
English accents: (video is in Spanish w/English subtitles, examples in English)