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• The mandatory `content` field represents a key in i18n files (src/assets/i18n/*.json5).  You will need to add a new key to this file to store the help text.
• This
`id` should be a unique identifier for this tooltip, to distinguish it from other tooltips on the page.
• `tooltipPlacement` (optional) determines where the text bubble appears relative to the help button. Its type is an array of Placements; see the 
    ng-bootstrap documentation for more information.
• `iconPlacement` (optional) should be assigned either 'left' or 'right', and determines whether the tooltip will be 
  placed on the left or on the right of the element.

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