If you click on the link after this description, a new screen will supersede, or replace, this one. A longer description will supplant, or supersede, by replacing this brief one.
Most words that include super have something good going on. Supersede is from the 16th-century Latin for "sit on top," and it often means to replace with something better. A version 10 of a computer game will supersede, version 9, making it more exciting. Unfortunately, a person might be replaced too, as in "the younger running back will supersede the veteran player as he gets older." To supersede is generally a good thing, but being superseded is not always that great for the replaced person.