does weed go bad?

La’Tisha • Tee 💘 IG: justbeingtee_

I’ve only been smoking for about a year now & I do it pretty moderately so this is new for me.. I was cleaning my room the other day & I found some weed in a baggie tied in a knot in one of my purses but I have no idea how long I’ve had it 😂 I totally forgot about it. so I was curious if it’s not good anymore since it’s been some time or does weed lose it’s potency over time?