It isn't for today. Another problem some believers encounter is the idea that gifts of the Spirit ceased about the same time that the apostles' collection of letters was compiled into our Holy Bible. No scripture anywhere states that gifts of the Holy Spirt are to cease. Church history shows that there have always been in every generation those believers who were filled with the Spirit and displayed God's gifts in their lives. On a global scale, half of all believers today are now charismatic Christians.
Tongues cause confusion.
Finally, there is confusion among some regarding the initial evidence of speaking in tongues versus the similar but different gift of unknown tongues for the assembly. This latter public gift is a manifestation of the Spirit that should normally be accompanied by the gift of interpretation, thus being equivalent to prophecy. Indeed, the public gift is not for everyone. The evidence is the fruit and the gifts. The primary fruit is love.