Pauline Hanson's independent party is still small and she has to grow it in order to have a chance of winning federal, state and local elections, or win seats so that her party can at least have a say on what policies and laws the government tries to implement and try sway those decisions that have to be voted on by parliament. The more seats she has the more influence she has over policies and laws
To be able to govern a country, the party attempting to win the gong to govern only needs to get one more seat than just half of the number of seats in the in the parliament and just over 50 % of the vote after the distribution of preferences.
Which means that Pauline only has to get just over 25 % of the population to vote for her party after the distribution of preferences.
But the likelihood of winning with just 25 % of the distributed vote when spread across all of the Australian seats, is very highly unlikely.