Abolition of slavery and serfdom is when people stopped being owned like property by other people. This happened at different times in different parts of the world.
In Europe, serfdom was abolished in Russia in 1861, in Austria-Hungary in 1848, and in Prussia in 1823. Slavery was more widespread, and it was abolished in France in 1848, in the British Empire in 1833, in the Netherlands in 1863 and in the United States in 1865.
In Latin America, slavery was abolished in Brazil in 1885, in Cuba in 1886, and in all Spanish colonies in 1811.
In Africa, slavery still exists in some countries, but it has been abolished in most countries since 1880.
Overall, people have been working towards the abolition of slavery and serfdom for centuries, and it is still a long process.