What is the Meaning of the Expression
TAKE ADVANTAGE OF?
for those learning to speak English as a Second, or Additional, Language (ESL or EAL)
To take advantage of someone means to exploit that person, or to treat the person in an unfair way so that you gain something.
In some countries, taxi drivers take advantage of tourists and charge them a higher rate.
make good use of the opportunity available to you
My friends from Mexico came to visit me in Canada. They took advantage of the mountains and snow, and learned to snowboard.
These two definitions have very different meanings.
The first meaning is negative. The second meaning is positive.