Under Suite Options | Misc | Logging, we get the option to log each and every HTTP request and response for the different tools that are part of Burp Suite.
Logging all requests and responses might be a client requirement or may be that you prefer keeping complete records of all requests and responses made. Even though this may not be required always, it is very reassuring to know that, if required, we can trace all the requests and responses we made using the tool sometime in the future. Have a look at the following screenshot:
