"From This Moment On" was released as the 4th single from the "Come On Over" album on March 14, 1998 in North America and Oceania, while being released in Europe on November 16, 1998 only. Musically, "From This Moment On" is a country pop ballad and is set in common time with a slow tempo of 68 beats per minute. The song is written in the key of G major with Twain's vocal range spanning from the low note of D3 to the high note of C5. Nick Reynolds of BBC Music described the song as a power new country ballad with "a beautiful melody".