Qiskit Runtime includes two primitives: Sampler and Estimator.
The Sampler estimates the entire quasi-probability distribution at the output of a quantum circuit by sampling from its output. This is useful for search algorithms like Grover's search.
The Estimator calculates expectation values of observables at the output of a circuit. Such observables can encode a large variety of things such as the electronic structure of a molecule, the cost function for an optimization problem, the kernel of a machine learning problem, and much more.
We are also introducing a new Pay-As-You-Go Plan on IBM Cloud, launching in beta today, which provides access to two 27-qubit Falcon processors to anyone with an IBM Cloud account.