This specific Mercury retrograde being in water-sign Scorpio means that it'll affect issues Scorpio presides over first and foremost: relationships and money. Scorpio is a sign known for being extremely intuitive and emotional, so we're likely to be feeling all the #feels over the next three weeks too.
But it's not always a bad thing: Mercury Retrograde is the time to look back on the past and reflect on what's working and what isn't. And while it's not the ideal time to sign any contracts or make any life-altering decisions, you can definitely let go of old grudges and reach out to people you've lost contact with.
Just make sure you give yourself an extra half hour to get to the airport if you have a flight to catch.