Admin Tool combined with a droplet to display certain strings on your website. You can either add the droplet call to your template or to the page(s) whre you want to display the text.
In the admin tool, you define a placeholder name and save the text to display, which can be a line of text, a long text (textarea) or a wysiwyg text.
In the droplet you add the placeholder, e.g. [ [ string?name=helloworld ] ] (spaces between brackets only here for display reasons). So once your created a string to display, you can simply edit it in the admin tool and do not need to edit the template or every single page any more since it is updated automatically.
You can create as many strings as you like.