Conjunções in Portuguese grammar are essential in connecting words, phrases, and clauses. They help create more complex and meaningful sentences by expressing relationships between different ideas. There are two main types of conjunções in Portuguese: coordinating conjunctions (conjunções coordenativas) and subordinating conjunctions (conjunções subordinativas). Coordinating conjunctions link words or clauses of equal value, while subordinating conjunctions indicate a relationship of dependence between clauses. Mastering the use of conjunções will greatly enhance your Portuguese language skills and overall fluency.