There are many strategies for trading stocks. The most common strategy is to buy and hold. You buy shares of stock, then hold them for years and years. The complete opposite strategy would be day trading, which is when you buy shares then sell them the same day before the market closes.
Each strategy has its advantages and disadvantages. For example, day trading can be expensive since you are trading frequently. Furthermore, since your trades are less than a year in duration, any profits are subject to short-term capital gains taxes.
To keep costs as low as possible, famous investors like John Bogle and Warren Buffett recommend buying and holding the entire stock market. Known as passive investing, it is a buy and hold strategy where you buy an entire market index, typically the NIFTY 50, as a single mutual fund or exchange traded fund (ETF). By buying an entire index, you are properly diversified (have shares in ~50 large companies, not just one), which reduces your risk long term.
Three other common strategies you may hear traders refer to include momentum trading (buying shares of very fast growing companies and selling them for a profit before they inevitably peak in price), swing trading (using technical analysis to identify a trading range, and then buying and selling shares as the stock trades within that range), and penny stock trading (buying shares of very small companies whose stocks trade for less than ₹10 a share).
Mr. Jhod 