var et_cdi
With the help of the parameter var et_cdi, a value (identifier) is passed that is used to identify the website visitor during cross device tracking.
var _btNoJquery
The loading of jQuery can be suppressed by setting the parameter var _btNoJquery = true; in the parameter block of the etracker code. However, this only makes sense if jQuery is loading on the website anyway, as otherwise smart messages and A/B tests cannot be displayed.