Parenthesis: Explanation and Examples - Grammar Monster
https://www.grammar-monster.com/glossary/parenthesis.htm
WEBA parenthesis is a word, phrase, or clause inserted into a sentence as an explanation or afterthought. When a parenthesis is removed, the surrounding text is still grammatically sound. A parenthesis is usually offset with parentheses (i.e., round brackets), commas, or dashes. These are called parenthetical punctuation marks.
DA: 95 PA: 48 MOZ Rank: 59