For example, let's say you want to install the Astra theme on your website. You would follow these steps:

1. Login to your WordPress dashboard
2. Go to Appearance > Themes
3. Click on the "Add New" button
4. Search for the Astra theme
5. Click on the "Install" button
6. Click on the "Activate" link
7. Go to Appearance > Customize to configure the theme's options
8. Check your website to make sure the Astra theme is properly installed and configured.

By following these steps, you can easily install a new WordPress theme on your website and give it a fresh new look. Remember to keep your themes updated for better security and performance.

Step 1: Login to your WordPress dashboardTo install a new theme on your WordPress site, you'll first need to login to your WordPress dashboard. Once you've logged in, you'll be able to access the backend of your site and make changes.

Step 2: Navigate to the "Appearance" menuOnce you're logged in, navigate to the "Appearance" menu located in the left sidebar of your dashboard. This will take you to the themes page where you can view all of the themes currently installed on your site.

Step 3: Select "Add New"On the themes page, you'll see a button labeled "Add New" at the top of the page. Click this button to access the theme directory where you can browse and search for new themes to install.

Step 4: Search for the theme you want to installYou can search for a specific theme by name or by features. Once you've found the theme you want to install, click on the "Install" button next to the theme's name.

Step 5: Activate the themeAfter the theme has been installed, you'll need to activate it before it can be used on your site. You can activate a theme by clicking the "Activate" link that appears after the installation is complete.

Step 6: Configure the themeAfter activating the theme, you'll need to configure its settings. This will vary depending on the theme, but most of the time you can access the theme options by clicking on the "Customize" button. Here you can change the theme's layout, colors, fonts, and other options.

Step 7: Test the themeAfter configuring the theme, test it to make sure it's working properly. Check that it's displaying correctly on your site and that it's functioning as intended.