  We review recent developments in the study of the AdS/CFT correspondence in
low dimensions, focusing on the construction of AdS$_3$/CFT$_2$ and
AdS$_2$/CFT$_1$ dual pairs in massive Type IIA string theory. We start
discussing the $\text{AdS}_3\times S^2\times \text{CY}_2\times I$ solutions to
massive IIA supergravity with $\mathcal{N}=(0,4)$ supersymmetry constructed in
1908.09851. We review the 2d CFTs dual to these solutions, together with their
defect interpretation as surface defects within 5d fixed point theories living
in D4-D8 bound states. Next, we discuss the $\text{AdS}_2\times S^3\times
\text{CY}_2\times I$ solutions with $\mathcal{N}=4$ supersymmetry constructed
in 2011.13932. We discuss the superconformal quantum mechanics dual to these
solutions, that we interpret in terms of line defects realised as D0-D4 baryon
vertices in 5d Sp(N) fixed point theories. We review a particular example in
this class of solutions, constructed through non-Abelian T-duality with respect
to a non-compact isometry group, and discuss the possible embedding of a 3d
black hole geometry constructed long ago via non-Abelian T-duality within this
solution.
