need solution Product Missing Fields errors in searcch console.

[sjnasim09]

Please give me a good solution of them. I know its warning but I want to fix it. Today I actived review products also.  

StatusTypeValidationTrendItems

Warning	Missing field "aggregateRating"	Not Started		14
Warning	Missing field "review"	Not Started		14
Warning	Missing field "brand"	Not Started		14
Warning	Missing field "url"	Not Started		14
Warning	Missing field "sku"	Not Started		14
Warning	No global identifier provided (e.g., gtin, mpn, isbn)	Not Started		14

[MS-WEB-DESIGNER]

Dear @sjnasim09 

Use Schema markup app.