What do the scholars mean by the unrestricted public interests (masalih al-mursalah)?

The questioner:
He says: My brother, I read and hear sometimes the phrase of the jurists, "the unrestricted public interest." I hope you will clarify it for me. May Allah grant you success.

The Shaykh:
This is a matter of the principles of jurisprudence (usul al-fiqh), and the questioner should have learned it first, because this is a matter of the principles of jurisprudence that a person does not reach except after he has learned the principles of jurisprudence. If he learns the principles of jurisprudence, this matter becomes clear to him. But if he does not know the principles of jurisprudence, even if we explain it to him, he will not benefit from it. The unrestricted public interests are the benefits for which the Shari'ah has not come with a ruling regarding their consideration or their rejection. These are the unrestricted public interests: benefits for which there is no evidence for adopting them and no evidence for leaving them, and they are a benefit and a utility. Yes.

The questioner:
May Allah reward you with good. With an example, Shaykh Salih, the speech becomes clear. May Allah reward you with good.

The Shaykh:
Everything new, everything that arises in the lives of people, in the transactions of people, for which there is no clear evidence, either it is explicitly stated, or it falls under its generality, either it is explicitly stated or it falls under its generality, this is the place of the unrestricted public interests. Yes.