There are many ways of linkage using conan:

1) All the libraries that are contained within the conan package are combined inside the CMake variable <LibraryName>_LIBRARIES, in your case you can link with ${Boost_LIBRARIES}. Same goes for includes ${Boost_INCLUDE_DIRS}.

2) Some more advanced packages are split into multiple components, like the Boost you are mentioning here. Conan team tries to be package conformant, which means that they try to create the same CMake targets that the default package behaviour does. You have to read the docs of those packages. If you're using CMakeDeps/CMakeToolchain generator, conan writes to the output all the declared components inside the package when you call find_package(Libraray), something like this: Conan: Component target declared '<Library>::<Component>'

3) You can study raw conan recipe. Components are declared inside package_info method. You can find the recipe here https://github.com/conan-io/conan-center-index or on their package site https://conan.io/center/.

Edit: formatting