Converges: When a series converges, it means that its terms add up to a finite value as more terms are added. It's like pouring water into a cup until it reaches its maximum capacity without overflowing.
Diverges: When a series diverges, it means that its terms do not add up to a finite value as more terms are added. It's like pouring water into an infinite hole - no matter how much water you pour, it will never fill up completely.
Geometric Series: A geometric series is a special type of series where each term is obtained by multiplying the previous term by a common ratio. For example, 2 + 4 + 8 + 16 + ... is a geometric series with common ratio 2.