If you running numerous PowerShell scripts and need to have feedback on the command output. Then the command Output Start-Transcript could really benefit you. However, if you looking for accounting or auditing then this is not the best way. You have multiple ways to implement this you could:

Script Start

Start-Transcript

All your scripts

Stop-Transcript

Script End

or

Start-Transcript

Run all you scripts within a given session

If want to specify a particular path then use:

Start-Transcript -Path C:\PreviousFiles.txt -Append

Command Breakdown

Start-Transcript start recording output.

-Path specifies the files path where the transcribed information will be put.

-Append this specifies that you wish to add the new information to the end of an existing file.