The verb advocate comes from the late Latin word praeconizāre. According to the first meaning mentioned by the dictionary of the Royal Spanish Academy (RAE), the term refers to publicly express praise for a person or something.
To advocate, therefore, implies exalt or praise. Whoever advocates communicates his support someone or a provision, a project, a idea, etc., considering it appropriate or beneficial for a purpose.
For instance: “The candidate dedicated himself to advocating lower taxes throughout the campaign”, “I don’t care what others want to advocate, for my part I know that our organization works exclusively to help those most in need”, “Several actresses confirmed that they will participate in the march to promote legal, safe and free abortion in all hospitals in the country”.
Take the case of an activist who is dedicated to advocating the peace. This person participates in marches against wars, makes claims in front of state offices in countries with warmongering policies and goes to the media to denounce the humanitarian tragedies caused by armed conflicts around the world. As can be seen, in his case advocating peace means promoting and spreading a non-violent culture.
The RAE It also indicates that, in the field of religion, the act of praising is carried out by the pope when he appoints a new bishop. On the other hand, to advocate implies to notify in the consistory of Rome the virtues and endorsements of the one presented by a monarch for a prelacy.