Mars opposing Venus puts assertion and attraction on opposite ends of your chart. What you want and what keeps the peace may not be the same thing for a couple of days.
This transit has a reputation in the astrological tradition for creating romantic tension. Not necessarily bad tension. Sometimes it is the kind that makes things interesting. The opposition between Mars and Venus can heighten attraction precisely because there is friction. You want something and the path to getting it requires navigating another person's needs or desires.
Outside of romance this can show up as tension between spending and saving, between self-assertion and social grace, or between what pleases you and what pleases others. Venus wants everyone comfortable. Mars does not care about comfortable. The opposition asks you to find a way to want something without bulldozing the people around you.
What you might notice: Romantic tension or heightened attraction with an edge. Friction between your desires and a partner's expectations. Social situations where assertiveness clashes with politeness. Financial impulses that conflict with practical values.
Astro Transit Academy is an educational resource for exploring transit astrology. The information here is not personal advice or prediction. Astrology is a framework for self-reflection, not a script for living.