This introductory chapter provides background on the phenomena of Pseudo-Coordination (PseCo) and Multiple Agreement Constructions (MACs) with the aim of familiarizing readers with major trends in previous research on these varied phenomena. Common structural and functional properties used to identify PseCo and MACs are described, along with a detailed discussion of the features that make crucial differences within each phenomenon in individual languages and cross-linguistically. We also observe interesting similarities between the two phenomena and across related and unrelated languages. We maintain a pre-theoretical view here that is compatible with the different approaches represented in the volume.