The Missale Aboense, created under the auspices of Bishop Konrad Bitz of Turku, signifies a monumental achievement in Finnish cultural and religious history. As the first known printed book in Finland, it represents not only a vital liturgical resource for the Catholic Church but also an important step in the development of written Finnish language. The preface penned by Bitz highlights the bishop's commitment to establishing formal ecclesiastical practices in a region where Catholicism was being fortified during the late medieval period.

The book was composed in Latin, reflecting the Church's priorities at the time and targeting an audience that included clergy and educated laypeople. It included official prayers and rituals used in the Catholic Mass, thereby standardizing worship across the Finnish territories. The creation of such a book helped to anchor the ecclesiastical authority of the Church in the region and provided a uniform resource for the clergy to follow.

The significance of the Missale Aboense extends beyond its immediate religious function; it also laid the foundation for future Finnish literary tradition. By providing a written form of religious practice, it encouraged the development of literacy in Finland and promoted the transcription of Finnish and Latin texts in the years that followed, influencing both the religious and cultural landscape of the country.