The Lionesses have conquered the hearts of the country with their run to the final of this home European Championship, which will take place against Germany at Wembley on Sunday.
England have played to sold-out crowds for all of their matches, while millions of people across the country have watched on television.
Williamson believes the Lionesses run has had a broader impact than football and has even influenced how society views women.
“I think what we’ve already seen in the tournament is that this has not only been a change for women’s football, but also for society in general, how we are viewed,” Williamson said.
“I think tomorrow is not the end of a journey, but the beginning of it. And I think that regardless of the end result of that match, there will be a good moment for reflection.
“Obviously my job is to go out for 90 minutes, play and win, but looking back at this tournament as a whole, I think we’ve really started something.
“Like I said, I think tomorrow is the start of that. I want this to be the beginning. I want this to be a sign for the future, not looking back on what has gone before.
“I’ve only been involved in this workplace, in football, but I think in most workplaces around the world, women still have a few battles to fight and try to win.
“I think for every success we make, for every change of judgment or perception or opening the eyes of someone who sees women as having the potential to be equal to her male counterpart, I think that change in the causes society.
“I think that’s a powerful message that we have the power to, in a typically male-dominated environment, these steps that we’re taking can impact everyone on that larger scale.”
If England beat Germany in the final, it will be the first time in the history of the Lionesses that they have won a major trophy.
Germany, on the other hand, boasts a formidable award ceremony and they have won eight of the 12 euros so far.
England and Germany have a strong, historic rivalry, but Williamson won’t let this affect how she prepares.
“I think it’s a good story for you guys [in the media]Williamson said.
“Of course it’s a fairytale fixture with the history behind it. But I think for us you would never expect to reach a final without playing against the best team in the tournament and, in terms of the journey we have both been on, you have the two best teams that already had the best tournaments in the final, which is the best.
“We expected this, to play against a team that plays their best football and luckily we play ours.”