What is the significance of Sojourner Truth?

Sojourner Truth is significant because of her work against
slavery.  Truth was born a slave around 1797 in New York state.  Her birth name was
Isabella Baumfree.  She chose the name "Sojourner Truth" for herself later on in her
life.

Truth became free because she was living in New York
when the state outlawed slavery.  After she became free, she became a lecturer, giving
speeches about what it was like to be a slave.  She gave lectures in 21 states and in
the District of Columbia.  Her most famous speech is now known as "Ain't I a Woman." 
This speech was given in 1851 at a women's rights meeting in
Ohio.

Overall, then, Sojourner Truth is significant as an
advocate of abolition.  She is the most famous black female abolitionist
speaker.