Google Chrome keeps track of the sites you visit often. When you open Chrome and the home page is set to default, you will see thumbnails of your most visited sites below the Google search bar.
Steps
Method 1 of 2: Delete sites one by one

Step 1. Open Google Chrome or a new browsing tab
If you haven't changed the homepage yet, the default page will show the Google search bar. Below are thumbnails of some of your most visited sites

Step 2. Point your cursor over one of the thumbnails
A small X (close) button will appear at the top right.

Step 3. Close
Click on the button X to remove this site from the list. If you've been to multiple sites lately, you'll see the thumbnail of the next site on the list.
Method 2 of 2: Delete the entire list

Step 1. Go to Settings
Open Google Chrome settings by clicking the button in the upper right corner of the window.

Step 2. Click History
In the popup menu, click Historical. You can also open the History tab by pressing the keys simultaneously. CTRL and H on your keyboard.

Step 3. Click the Clear Browsing Data button
A small window will appear where you can select the data you want to delete as well as the time.

Step 4. Click the drop-down button and select from the beginning

Step 5. Click Clear Browsing Data
All sites in the list of most visited sites will be deleted.
Advice
- Clearing browsing data will not only clear the list of the most visited sites, but will also clear all the lists on your browser such as recent downloads.
- Deleting browsing data will free up space on your hard drive.