What is spell attack bonus?

A spell attack bonus is a numerical value that is added to the roll when attempting to hit a target with a spell. It is determined by adding together the caster's relevant ability modifier (such as Intelligence for wizards or Charisma for sorcerers) and their proficiency bonus. This total number represents the character's proficiency with casting spells and their innate ability to successfully aim and hit a target with magical attacks.

Having a higher spell attack bonus increases the chances of successfully landing a hit with a spell, making it more likely for the spell to have its intended effect on the target. Spell attack bonuses can be modified by factors such as magical items, spells or abilities that increase a character's accuracy with spells.

In most tabletop roleplaying games, spell attack bonuses are used primarily in combat to determine whether a spell successfully hits a target. It is important for players to keep track of their spell attack bonuses in order to accurately calculate their chances of hitting targets with spells during gameplay.