difference between by and find element by in selenium code example

Example: find element vs find elements in selenium

Differences between findElement and findElementS method?
    --> findElement():
     
      -It does returns SINGLE web element.
      - Return type: WebElement
      - If it cannot find a web element, it throw - NoSuchElementException
          
   
   --> findElements():
      - Returns a List of WebElements
      - Return type: List<WebElement>