is this a simple sentence?

It's important to use social media responsibly and moderately to avoid any potential harm to your mental health, privacy, or general wellbeing.

No, this is a complex sentence.

No, the sentence "It's important to use social media responsibly and moderately to avoid any potential harm to your mental health, privacy, or general wellbeing" is not a simple sentence. It is a complex sentence because it contains a dependent clause ("to use social media responsibly and moderately") and an independent clause ("It's important... general wellbeing") connected by the conjunction "and".

Yes, "It's important to use social media responsibly and moderately to avoid any potential harm to your mental health, privacy, or general wellbeing" is a simple sentence.

A sentence is considered simple when it consists of only one independent clause, which is a group of words that contains a subject and a predicate and expresses a complete thought. In this sentence, the subject is "It's" (which is a contraction of "It is") and the predicate is "important to use social media responsibly and moderately to avoid any potential harm to your mental health, privacy, or general wellbeing." The sentence expresses a complete thought, making it a simple sentence.