Adding Environment Variables
No, it is the path where you have created the pdfc symbolic link.
The command you ran was incomplete - you need to first replace /absolute/path/of/the/folder/script/ with the actual path to the pdfc symbolink link. In addition you must use the full command including &gt;&gt; ~/.bash_profile in order to actually get something saved in the bash profile.
Also, the 3rd line you quote is just wrong (also in Github itself), it should be
echo 'export PATH=&quot;/absolute/path/of/the/folder/script/:$PATH&quot;' &gt;&gt; ~/.bash_profile

As you have already run the wrong command you'll need to edit your .bash_profile manually (e.g. with nano) to fix the wrong definition. Either source .bash_profile afterwards or open a new Terminal tab/window to load the new value.