Manglik yoga is also known as Manglik dosha.
When Mars is in first, fourth, seventh, eighth and twelfth house in Lagna chart, it creates a Manglik dosha. As Mars impact the seventh house either by aspect or its placement while it is in first, fourth, seventh, eighth and twelfth house, it creates a manglik dosha. As Mars is a malefic planet, it creates relationship issues in married life when it sits or impacts seventh house. There can be arguments and fight in married life and the native can face certain issues in married life.
But at the same time, Mars is a soldier and manglik people knows their capability. They are also very protective about their relationship when Mars is in good dignity. The maturity of Mars is from 28 to 31 years of age. Mars releases its aggressive energy during or after that age.
On the contrary when a Manglik person marries another Manglik, it cancels the manglik dosha. However, there may be arguments and fights even after considering manglik marriage.
But if a Manglik marries another non Manglik, there can be difference of energy and so it is better to do the remedy before marriage.