Answer:
A responsive layout is usually a common and important aspect of a theme since it can allow users to use different devices and receive a proper satisfactory visit.
Step-by-step explanation:
Depending on the purpose of the site, you need to be decided what functionalities you deem necessary and which are just useful in case you might need it later on. Example
A blog site will required a good blog theme,
including one that has ecommerce options depends weather the blogger might be thinking of selling things or not.