If you use discretion, you sift away what is not desirable, keeping only the good. If you have the freedom to choose, something is "at your discretion." Watch out when you hear the phrase "viewer discretion advised" on TV or at the movies — you will most likely encounter profanity and violence. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.