Q. Explain about matching principle?

The matching principle need that expenses incurred in producing revenues is deducted from the revenues they generated during the accounting period. The matching principle is one of the fundamental principles of accounting. This matching of revenues and expenses is necessary for the income statement to present an accurate picture of the profitability of a business. Adjusting entries replicate unrecorded economic activity that has taken place but has not yet been recorded. Why has the company not documented this activity by the end of the period? One reason is that it is more economical and convenient to wait until the end of the period to record the activity. A second reason is that refusal source document concerning that activity has yet come to the accountant's attention.