Pet Clinic template - Help on instalation

In the chunk "Header.PetClinic":

Create a document width pagetitle, for example, Search Results, paste [[!SimpleSearch]] at the content area, and specify the id of the document received in the parameter &landing in snippet SimpleSearchForm. 

In the chunk "MainPageBlocks.PetClinic":

Create a document width pagetitle Services, create children documents here, and specify the id of the document received in the parameter &parents in snippet getResources.

Create a document width pagetitle New articles, create children documents here, and specify the id of the document received in the parameter &startId in snippet Wayfinder.