Breastfeeding for 6 months?

Tatiana🇨🇷♈️💍🇩🇴♏️ • Happily Married. 💏 👰🏽 12.19.08 💙 07.10.16 💓 02.29.20 💙 🐸 🤱🏽BreastMILK is best 🚫 formula
Can someone please tell me what it means when some moms say I plan to only breastfeed for 6 months? What do u do for the remainder of the year? Just give them formula? Once the baby gets 6 months is breast milk not important  anymore?  I  understand babies can start eating food at 4-6 months but do babies not need milk until the age of 1? 🤔