"As is often the case" is a phrase used to indicate that a situation or circumstance being discussed is common, typical, or frequently observed. It suggests that what is being described is not unusual and may be expected in similar situations. Here's an example of how it might be used:

"As is often the case, the company's profits increased during the holiday season."

In this sentence, the phrase emphasizes that the increase in profits during the holiday season is a common occurrence.