A combinator is a term used to describe the relationship between selectors. There can be more than one simple selector in a CSS selector. A combinator can be inserted between the simple selectors.
Browsers use specificity to determine which CSS property values are the most relevant to an element and, as a result, will be applied. Specificity is determined through matching rules, which are made up of many CSS selectors.
The descendant combinator — typically represented by a single space (" ") character — combines two selectors such that elements matched by the second selector are selected if they have an ancestor (parent, parent's parent, parent's parent's parent, etc) element matching the first selector.
CSS combinators are a set of CSS properties that are used to combine multiple selectors into a single selector. They allow us to write CSS rules in a more compact and readable way.
CSS combinators can be used in many ways and they can help you to write more efficient CSS rules. There are three types of CSS combinators:
The first type is the "pseudo-class". This is the most common type of combinator and it's used for styling particular parts of the page or document. The second type is the "class" which is used to group elements together with similar styles. The third type of selector is the "attribute" which allows us to target particular elements on an HTML element with a specific class name.