The Sun enters Virgo on August 22nd, and Mercury (Virgo's ruler) follows on August 23rd. These two planets will be unified (conjunct) until August 24th.
Virgo is about specific communication, specialized ideas, details and improvement. When the Sun and Mercury meet, it will be about that one, perfect "thing" that you say or write or want to express. This may be something you want to fix, or something you focus (obsessively) on.
But, from August 22nd to August 26th, Mercury and the Sun will oppose dreamy Neptune at 4-3 degrees Pisces (Neptune is moving backwards). Neptune/Pisces is fantasy, Mercury/Virgo is logic. Dreams may undermine your focus, or elevate your idea from helpful to exceptional. Check (and double check) what you are communicating/worrying about during this influence. Is it based in reality? Can you take it higher/improve it, or should you just let it go?
If you have planets/angles from 0-4 degrees Virgo or Pisces, this influence will impact you directly.