Used in organic synthesis as an intermediate for pharmaceuticals and agrochemicals. Serves as a building block in the preparation of bioactive molecules, particularly in the development of kinase inhibitors and anti-inflammatory agents. Also employed in materials science for synthesizing fluorescent dyes and optoelectronic materials due to its conjugated aromatic structure. Commonly utilized in cross-coupling reactions, such as Suzuki and Heck reactions, to form complex indole derivatives with potential biological activity.