I can tell you my opinion after after A Room Of One's Own. In this work, she says she's been asked to talk about women and fiction, and that is actually the purpose of her book, to give her opinion on it. Her thesis is that "a woman must have money and a room of her own if she is to write fiction". What she means by this is that:
First: It's almost imposible for a woman who doesn't have money and needs to devote most of her time and energy to provide for herself and her family to have time to write something worth publishing.
Second: If a woman doesn't have her own place (i.e. an office) to be able to write, she will be continuously interrupted and so will be her train of thought, therefore it will be more difficult for her to produce good quality writing.
The trascendence of this is that Virginia Woolf was defending women against the common accusations that works by female writers were not good enough, and her defence is crucial because it establishes the cause as a circumstancial one, instead of attributing it to the fact that women were inferior by nature, as was usually the case. The gradual acceptance of this opened the road for many other female writers until today.
Also, she vindicated the right of women to be independent, and made a implicit call for those who wanted to write and improve their intellectual activity in general to become independent and find that space for themselves, the 'room of their own'.
I hope this helped!!