This is the 11973rd most frequent Portuguese word.
rastrear
To track or trace.
In this sentence, 'rastrear' is used to indicate following the progress or location of a physical item being shipped.
Eu vou rastrear o pacote da encomenda.
I will track the parcel of the order.
Here, 'rastrear' is used in the context of uncovering the source or path of a non-physical entity, such as information or data.
Eles tentaram rastrear a origem da informação.
They tried to trace the origin of the information.
In this usage, 'rastrear' refers to locating a device or signal using technological means.