Rocket.Chat/app/apps/client/admin/appWhatIsIt.html

<template name="appWhatIsIt">
	<section class="page-container page-home page-static content-background-color">
		{{> header sectionName="Apps_WhatIsIt" hideHelp=true fixedHeight=true}}
		<div class="content">
			{{#if isLoading}}
				{{> loading}}
			{{else if hasError}}
				<div class="apps-error error-color">
					<i class="icon-attention"></i>
					<p>Sadly, an error has occured while loading this page.</p>
				</div>
			{{else}}
				<p>{{_ "Apps_WhatIsIt_paragraph1"}}</p>
				<p>{{_ "Apps_WhatIsIt_paragraph2"}}</p>
				<p>
					{{_ "Apps_WhatIsIt_paragraph3"}}
					<a href="https://github.com/RocketChat/Rocket.Chat.Apps-dev-environment/blob/master/README.md" target="_blank">https://github.com/RocketChat/Rocket.Chat.Apps-dev-environment/blob/master/README.md</a>
				</p>
				<p>
					{{_ "Apps_WhatIsIt_paragraph4"}}
					<button class="rc-button rc-button--primary js-enable">{{_ "Enable" }}</button>
				</p>
			{{/if}}
		</div>
	</section>
</template>