A Microsite is a simple page with a specific purple (e.g. ad campaigns, events, tools, etc.). It usually has an easy structure and, most importantly, a clear CTA.
Although a microsite does not normally match our web structure, it still needs to follow our basic brand guidelines for marketing (fonts, colors, etc.). However, this should not stop you from getting creative with visuals and wording.
Keep in mind that the microsite and ads leading to it should share the same visual style.
For a fast and smooth coding process, try to start with some of our pre-designed and tested templates for microsite which are included in the .sketch Web UI Kit. If none of the templates work for you, don't hesitate to contact the design team.