question on "local" folder

[splunkatl]

I am new to Splunk. I have two splunkforward servers, first server is already configured by someone else as splunk forwarder .I am trying to set up second server.
I untar the splunk forward software. I compared all folder and files in both server. I copied one folder "splunkuniversalforwader/etc/apps/Splunkforwader/local" from first to second one. boom everything is working fine.
My question is how is "local" folder get created in first server "splunkuniversalforwader/etc/apps/Splunkforwader?
Do I need run any CLI rather copying from other server?

[Damien_Dallimor]

Local folder is for any updates to configuration files that happen post installation ie: non-default settings.So the Local folder gets created when you make a configuration change ie: enabling an input, creating a field extraction via Splunk web etc...

[Ayn]

No, that is for regular app contents only.

[Splunk_U]

Can I create local folder @ /opt/splunk/share/splunk/search_mrsparkle/exposed/img/skins???