Drupal Upgrade module: SQL table prefixes and upgrading from Drupal 7 to Drupal 8
It means that if you were to install another Drupal, 7 or 8 on the same database (zentech0_Benia), using prefix will prevent causing confusion/collision. 

Ex: 

having two tables named accesslog is confusing.

while having site1_acesslog, site2_acesslog you know which accesslog belongs to which site. 

In conclusion, if you don't plan on installing another Drupal 7 or 8 in zentech0_Benia, (having 2 websites in the same database) then you don't need table prefixes.