Many people come to Spain with different objectives and projects. There are people who come for sightseeing, others to visit a family member or friend living in Spain. Other people come here in search of a better future, work, studies, opportunities.
There are so many possibilities that it is not recommended to apply for Spanish nationality (solicitar nacionalidad española) in all cases. If you know your stay will be short, it’s not necessary. But if you have decided to stay for several years, or even as a place of permanent residence, this may be of great interest to you.