Step::1 Login to your Magento dashboard and go to Find Partners and Extensions section at the bottom of the left sidebar.
Step::2 Here click over Visit Magento Marketplaces
Step::3 Select the themes and add it to the cart
Step::4 Click on Add to Cart and then Proceed to Checkout
Step::5 Fill out the required details and then click over Place Order button
Step::6 Once your purchase is completed, click over Install
Step::7 Next click on Create a New Access Key
Step::8 Once you get the Access key, simply click on Copy button
Step::9 Now in your Magento dashboard, go to System and click on Web Setup Wizard.
Step::10 Next click over Extension Manager
Step::11 Enter here both Private and Public key which you copied earlier and click over Submit button
Step::12 Click on Review and Install button
If you want to view the themes which you have recently installed then simply go to Content section and click on Themes.
Congratulations, you have successfully installed themes in Magento !!!
Visit our Blog for more details. You can also watch the video here.