guide
/ˈgīd/
noun
one that leads or directs another's way
a person who exhibits and explains points of interest
something that provides a person with guiding information
needed a guide for the safari
The museum guide was very helpful.
verb
to act as a guide to : direct in a way or course
to direct, supervise, or influence usually to a particular end
to superintend the training or instruction of
He guided us around the city.
noun
a dog trained to lead the blind