There are different usage rights for the images from your Google search, some are free and others are not. Please see below the steps to search for images or video that are free to use.
Step 1: Open Google Chrome;
Step 2: Click "Images" from the top-right corner;
Step 3: Click "Settings" from the bottom-right corner;
Step 4: Click "Advanced search" from the list;
Step 5: Type the search terms in the search boxes (e.g., apple);
Step 6: Move the cursor to the bottom of the page, and select one of the options from the list in the "usage rights" section, e.g., "free to use or share, even commercially";
Step 7: Click "Advanced Search" at the bottom.