All spells have an elemental affinity. Fire deals fire damage, Blizzard deals ice damage, and Thunder deals lightning damage.
Most enemies have elemental weaknesses that can be exploited to deliver lethal attacks.Loading screen tip
The following is a list of all elements in Final Fantasy VII Remake. The element of one's attack determines the damage it deals depending on the target's weakness or resistance; if the target absorbs the element of the attack, they gain health rather than lose it. Several 
Magic Materia also have an element; if a character has the 
Elemental Materia equipped, they can pair it with said magic materia to imbue their attacks with the element, or resist against it.
Fire[]
Fire is the earliest accessible element. It can be used by characters with the Fire Materia equipped, and is the element of the summon Ifrit and a command for Chocobo Chick.
In "Episode INTERmission", Yuffie can use Fire Ninjutsu to imbue her ninjutsu attacks with the Fire element.
Fire is effective against most of the human enemies, save for a few bosses.
Ice[]
Ice can be used by characters with the Ice Materia equipped. It is also the element of the summon Shiva and a command for Chocobo Chick.
In "Episode INTERmission" Yuffie can use Ice Ninjutsu to imbue her ninjutsu attacks with the Ice element.
Ice is effective against most of the biological enemies, save for a few bosses,
Lightning[]
Lightning can be used by characters with the Lightning Materia equipped. It is also the element of the summon Ramuh, exclusive to "Episode INTERmission".
In "Episode INTERmission" Yuffie can use Lightning Ninjutsu to imbue her ninjutsu attacks with the Lightning element.
Lightning is effective against all mechanical enemies, including bosses.
Wind[]
Wind can be used by characters with the Wind Materia equipped. It is also the element of the chocobo aspect of the summon Chocobo & Moogle, and a command for Chocobo Chick. In Final Fantasy VII Remake Intergrade, Aero spells now stick to enemies, and thus always hit.
In "Episode INTERmission", Yuffie specializes in Wind with her Wind Ninjutsu and Windstorm abilities.
Wind is effective against most of the flying enemies, save for a few bosses.