Hacked wordpress is pain but after get it restored you must cleanup manually a few aspects for optimum performance. To make sure you follow Google rules you can use Google webmaster tools to detect the mess.
Check Crawl Errors
Google Bot will tell error they found during scanning process.
Click Errors then check every aspects (desktop, smartphone and feature phone)
Soft 404 mean Google think its not exist but its do exist.
As you see from the picture. WordPress tags put ‘un relevant’ content for your blog.
To get rid of this tags :
1. Login to wordpress
2. Click Tags under Post section
3. Check the box and delete un related tags manually.
Mark as Fixed
Some links might respond slow then Google bot think it doesn’t exist. Check it manually by visit the link and click “mask as fixed” when you’re done.