What it is: The “stronger” syllable in a word.
What it’s for: Sound natural and be understood. Wrong stress can confuse listeners.
Example: PREsent (noun) vs preSENT (verb)
Quick rules (useful)
Many 2-syllable nouns/adjectives: stress first: TAble, HAPpy
Many 2-syllable verbs: stress second: reLAX, deCIDE
Words ending in -tion/-sion: stress the syllable before: eduCAtion
Practice
Mark stress when learning new words: phoTOgraph, phoTOgrapher, photoGRAphic