Have you used present perfect recently?

This looks like as though it might function as the opening sentence of an IELTS Task 2 essay. Let's first of all remind ourselves about some ideal features for the IELTS Task 2 opening sentence:

1. We're introducing the topic as stated on the IELTS question paper.
2. We're thinking about our reader and what might be interesting to him/her. (Our reader is an educated non-specialist, someone quite educated, who reads a lot and knows what's happening in the world.)
3. We're relating the topic to a current situation or event, because current situations or events are automatically interesting.
4. We're relating the topic to a local context, because that's also interesting to our reader, and because we know more about local than about distant contexts.

Even without seeing the question paper we can see that our writer has generally ticked these boxes. Now let's focus on the word recently. That's a good word to use as it helps to tick box number 3 - it helps us to focus on a current feature of the topic. However, we need to choose time expressions and matching tenses carefully if we want to communicate current.

Current = now

• Social media are the most common media used to share information.
• Social media are today the most common media used to share information.
• These days social media are the most common media used to share information.

All present simple tense!

Notice that present simple tense can mean now, and so you don't have to use a time expression.

Current = around now

• Social media are becoming the most common media used to share information.
• Social media are today becoming the most common media used to share information.
• These days social media are becoming the most common media used to share information.

All present continuous tense!

Notice that present continuous tense can mean around now, and so you don't have to use a time expression.

Notice also that to be cannot be continuous. In this case it is easy to use 'become' in the continuous, but only if you feel the situation is changing over time.

Current = up to and including now

• Social media have become the most common media to be used to share information.
• Social media have become the most common media to be used to share information recently.
• Social media have recently become the most common media to be used to share information.

All present perfect tense!

Notice that present perfect tense means 'up to and including now', and so you don't have to use a time expression.

Recently is a strong present perfect time expression and if you don't believe me, browse over and check out countless other examples at forbetterenglish.com.

Conclusion

Returning to our opening example, clearly our writer wants to communicate either now or around now, and so recently is not the most appropriate time expression! My advice would be to use present simple + today:

• Social media are today the most common media used to share information.