What are dimensionality reduction and its benefits?

[anshika-sharma-ac2988d4 (Anshika Sharma)]

What are dimensionality reduction and its benefits?

[iftekar-patel-f1e6bf65 (Iftekar Patel)]

Dimension reduction compresses large set of features onto a new feature subspace of lower dimensional without losing the important information.
ref:https://medium.com/swlh/what-is-logistic-regression-62807de62efa