To immigrate to the US, whether by visa from outside the USA or by adjustment of status if you are already in the US, you may have to prove to US immigration authorities that you will not become a “public charge” — in other words, you will have to prove that you will not depend on public assistance to meet your financial needs.
New policies put in place by the Trump administration have rendered it much more difficult to overcome the “public charge” barrier.
You may be required to find a sponsor to file an Affidavit of Support, Form I-864 on your behalf. Normally, your sponsor is the person who filed the immigration petition on your behalf — your spouse, for example.
Form I-864 solicits information that will allow immigration officials to determine whether your sponsor is financially capable of supporting you. Do not confuse this form with the new Form I-944, which solicits financial information from you, not your sponsor.