Hello,
Your question is not clear enough. If you mean product variations, please follow the instructions: A variable product is a product that has more than one option in attributes, for example, color, size, material. Instruction on how to create an attribute is here https://docs.woocommerce.com/document/managing-product-taxonomies/ as soon as the necessary attributes are available, a variable product can be created, instructions on how to create a variable product is here https://docs.woocommerce.com/document/variable-product/
More information is here: https://xtemos.com/docs/woodmart/variable-products-swatches/
If you mean the tabs, the first tab is the main description, and other additional inofrmation can be added as per instruction here: https://xtemos.com/docs/woodmart/product-page-options/
Best Regards