The vertex defines, influences, and provides insight into your relationships. It can be used to understand why you may feel a familiarity with one person and not with another. Or why do you tend to get along with people of a certain sun sign and cannot see eye-to-eye with those from another zodiac sign.
This point is also an indicator of destined meetings, connections, relationships, and incidents. And, perhaps this is why when these meetings happen, they give us a sense of deja vu.
In your birth chart, the vertex is generally created in the 5th, 6th, 7th, or 8th house. Its meaning and function change depending on the house in which it is formed. For example, if your vertex is located in the fifth house, you will be romantic in nature and be destined to fall in love. However, whether this love materializes or not would depend on the placement of other planets in your birth chart.
A sixth house vertex is indicative of a life destined to help others. The seventh house vertex, like the house it is located in, will make relationships important for you. And, a vertex in the eighth house suggests that you will be spirited and intense and may find your lifeβs calling or change the direction of your life because of love.