Intensifiers in grammar are words or phrases that amplify the meaning of adjectives, adverbs, or verbs, adding emphasis or strength to a statement. Common intensifiers include "very," "extremely," "really," and "absolutely." For example, in "She is very talented," "very" intensifies "talented." Using intensifiers in grammar enhances expressiveness, but overuse can weaken impact or sound informal. They vary by context—formal writing often favors subtle intensifiers like "considerably," while casual speech leans toward "super" or "totally." Understanding intensifiers in grammar helps balance clarity and emphasis in communication, ensuring precise and effective expression.