It's the opposite of verso, which is the left-hand page. You might see it used in these contexts:
* "The recto of the page features a portrait of the author."
* "The recto is usually numbered with an even number."
* "This manuscript has been carefully restored, with all recto and verso pages intact."
It's important to note that the meaning of "recto" can vary depending on context. In some cases, it can also refer to the front surface of a leaf of paper.