The 52-week high and low are the highest and lowest prices a share has touched in the past one year of trading. Brokers show both numbers on the stock's quote page. They give a quick sense of range. If SBI traded between ₹560 and ₹900 over the year and now sits at ₹880, it is near its 52-week high. Some traders watch stocks breaking above the 52-week high as a sign of strength, and stocks near the low as possibly weak or possibly cheap. Neither is a rule. A stock at a 52-week high can keep rising or fall sharply, and a stock at a low can keep falling. Treat the range as context for your own analysis, not as a signal on its own. Always check the number against the current quote, since it moves daily.