Dynamic way of remediating product & item attributes for ecom or stores

Product Attributes are key to the Ecom Sales; As Customers may search based on any Attributes of a Product like Brand, Color, Gender, style etc of a Category; Search results of Products could be from different Departments & Categories with same Attributes and would be challenging in determining which Product the Customers are interested in. Also challenges of incomplete Product attributes in the Catalog & inaccurate Taxonomy and its relationships. How to handle these Product & Item Challenges? Also addressing Data Quality issues of Item & Product. How to handle Product attributes if they are Not same on Omni channel like Stores, Ecometc.