Here you can extend your bottle compatibility adding new dependencies. These are Windows software and libraries installed by Bottles trough automation.
Some dependencies examples are:
vcredist (2013, 2015, 2019)
dotnet (3.5, 3.5 sp1, 4.0, 4.7.2, 4.8)
msxml (3, 6)
d3compiler (43, 46, 47)
and others, see here more.
Dependencies can also automatically be installed by the official Bottles installers. So if you choose to install e.g. the epicgamestore installer, you will see the new dependencies installed after the process.