Vishakha means branched or forked. Its two images say slightly different things. A forked branch is a point where you must choose one direction and give up the other. A triumphal arch is what you walk through when you arrive.
In Hindu mythology, this star belongs to two deities at once, which is rare. Indra is the king of the gods, who leads and conquers. Agni is the sacred fire, which transforms whatever is offered into it. Together they supply exactly what a long ambition needs: the will to lead and the heat to keep going.
Its shakti (the special power a nakshatra carries) is harvesting many fruits from sustained cultivation. That word, cultivation, is the important one. This is not a star of sudden luck. It is a star of tending something for years and then collecting.
The Hindu month of Vaishakha takes its name from this nakshatra, and it carries enormous significance. Vaishakha Purnima is Buddha Purnima, the day tradition holds that the Buddha was born, attained enlightenment and passed away. A month named for a star of determined seeking suits that story well.
Vishakha is known for ambition and staying power. Natives set a target and work at it for years without losing interest, which is far rarer than it sounds. Some texts also call this star Radha, which pairs it with the next nakshatra, Anuradha, meaning the one that follows Radha.