Hi. Good question and what many Catholics would love to answer. You can expect many different answers to this depend on what strikes them as personal or important.
I would say there are quite a lot of verses mentioning Mary in the Bible and those should be sufficient. She should not draw attention to herself and besides, Marian spiritually stipulates that Mary is always bringing us nearer to Jesus. She is always pointing toward her son.
She is important because she is Jesus’ mother. No other human is given that privilege, and Mary is the one and only, Jesus’ real mother. Christianity preaches the importance of the family. Even the Trinity can be considered a family – The Father, The Son and the Holy Spirit. Mary is the spouse of the Holy Spirit. The Church always recognized this since the beginning.
As for Mary in the Bible, consider this:
- She was there when Jesus was born.
- She was there during Jesus first miracle in his ministry.
- She was there when Jesus died on the cross.
- She was there (in the cenacle of the upper room) when the Holy Spirit descended on the apostles during the Pentecost.
These were some of the most important events of Jesus personal life and we can find Mary always there.
God bless.