SIP is similar to a Recurring Deposit. You can put small amounts in SIP (Systematic Investment Plan) every month. On a specified date the amount will get invested in mutual fund schemes or shares of your choice. Investment through SIP is a unique way of accumulating shares without waiting for market timings.
A SIP is a disciplined approach towards savings and investments. This helps you inculcate the habit of saving and building wealth for the future.
If you want to learn more check out these resources: