Your log messages consist of key-value pairs (label1=data, label2=data, and so on) and you may need access to any key's value.
Use the keyvalue operator in automatic mode, like this:
* | keyvalue auto
The keyvalue operator has many advanced options, but the auto mode simply extracts everything that looks like a key-value pair from your log messages. This allows you to refer to the value of a particular key, or (using the fields operator) to create a display column for each key and convert your log messages into a spreadsheet format.