Does increasing SGA improve performance of database?

Does increasing SGA improve performance of database?

Example: 

oracle version-> 12.1.0.2

OS RAM -> 32GB

SGA->

NAME                        TYPE    VALUE                                                 

-------------------------------------------------- ----------- --------------------------------------

lock_sga                      boolean   FALSE                                                 

pre_page_sga                    boolean   TRUE                                                 

sga_max_size                    big integer 4896M                                                 

sga_target                     big integer 4896M                                                 

unified_audit_sga_queue_size            integer   1048576                                                

Used SGA   -> 4783.81 MB

Please suggest if SGA should be increased?

Thanks