what is the exact meaning of this sentence:

Merak ediyorum seni

merak etmek = to be anxious about (worry), to be curious about (wonder)

Seni merak ediyorum

I wonder/worry about you

Generally I think it would be used for worrying about someone, especially if they were sick or you hadn´t heard any news from them for a while.

thank you very much. Someone said this sentence to someone - Merak ediyorum seni. In those exact words. So does it mean that they are wondering about them? They asked for a photograph. The person asked why do they need it and they said Merak ediyorum seni.

note : that was a super answer by the way very well explained. Does it mean the same as the way they worded it here is mixed up above.

In this case the meaning would be "I´m curious about you"

The word order can be changed, it´s often done in poetry, or for effect or emphasis, but the meaning is still the same.

Generally the Turkish sentence order is subject - object - verb, but often the subject can be omitted (because the suffix added to the verb indicates the subject)

Henry you are very smart. Thank you.

I find in speaking/casual language the order is often verb - object.

That can be confusing if you have just slaved for half a year getting accustomed to the official word order.

hahaha JNQ slaved for half a year!

Actually still slaving.