A very common use is giving milk or food to babies or small children to help them eat.
She feeds her baby with a bottle.
Parents feed infants every 3 hours.
'Feed' can mean to supply power, water, or other things into a larger system. It is common in technology and nature.
They feed electricity into the grid.
Water feeds the river from the lake.
As a noun, 'feed' means food given to animals, like hay or grain. It is common in farming contexts.
The horse needs fresh feed every day.
Farmers buy feed for their cows.
'Feed' as a noun means a continuous stream of data like news or posts on websites or apps. People use it for social media.
I checked the news feed online.
My social media feed shows new posts.
This meaning is more figurative, meaning to give support to feelings, thoughts, or growth inside a person.
Books feed her love of learning.
He feeds his creativity with new ideas.
'Feed' means to provide something continuously to keep a machine or animal working or alive, especially in industry or farming.
The factory feeds raw materials into the machines.
The feeder feeds grain slowly to the animals.