What does vain repetition in prayer mean?

In Matthew 6:7, Jesus speaks against 'vain repetitions' in prayer, identifying it as a practice of the heathen who believe their many words will be heard. This implies a prayer devoid of sincerity and understanding, merely a rote recitation. Instead, prayer should be genuine and heartfelt. For example, reciting the Lord's Prayer without truly engaging with its meaning falls into this category. Authentic prayer requires a connection to the Father, moving beyond repetition to true communication that reflects our hearts and acknowledges His character.