Terrific website with facts and no hyperbole.
An impeachment inquiry is a process to determine whether the House of Representatives will vote on impeachment and on what grounds. If the inquiry leads to a vote on impeachment in which a majority of representatives vote yes, then the president is impeached, which means the matter is referred to the Senate for a trial. In the Senate, if 2/3rds of senators also vote yes, then president would be removed from office.
What’s happening now
Democrats and Republicans both generally now agree on the facts — that President Trump asked Ukraine and China to investigate an election rival — but disagree on whether that action warrants impeachment.
Six House committees — including the House Intelligence, Foreign Affairs, and Oversight committees — will submit what they consider evidence of impeachable acts to the Judiciary committee which may then draw up charges, called articles of impeachment.