Default of magento v2, product details page just showing 3 tabs are: Details, More Information and Reviews. With this extension admin can add unlimited tabs. The tab can be use static blocks or attributes. Get more details: https://www.magesolution.com/product-tabs-for-magento-2.html
Features List:
Add tab use attribute
Add tab use static block
Enable "Review" tab
Enable "More Information" tab
Change title of tabs
Change position of tabs
Add unlimited tabs
Support for multi store views
Easy to manage
Easy to use

Using an Extension will save your lot of time and you will also get free Lifetime Support from the Developers.
You can Checkout this extension which I am using for the last 1.5 years- https://www.fmeextensions.com/magento-2-custom-product-tabs-extension.html

This extension allows you to add multiple custom tabs with useful information to the Product Page. Which makes the Product page more engaging and descriptive. Also, it helps to boost the growth rate.

Powerful Key Features
Create Unlimited Tabs
Add Text, Images, Videos and Widgets
Restrict Tabs by Store Views, Customer Groups
Assign Tabs to products by Product Attributes
Add Related, Cross-Sell Products Tabs
Add Start & End for Tabs