Log into your Themeforest account, go to your downloads and locate your theme. Click on the download button and select the “Installable WordPress file only”. This will download the zip file for your theme.
1- Go to WordPress dashboard > appearance > themes
2- Click the “Add New” button at the top of the window.
3- Click the “Upload theme” Then select meza.zip from your theme package folder
4- final step in installation is click on activate