To clear the cache on Safari, follow these steps depending on your device:

On Mac:

1. Open Safari.
2. Click the Safari menu in the upper left corner and select Settings.
3. Go to the Privacy tab.
4. Click Manage Website Data....
5. Select Remove All to clear all cache and website data or choose specific websites to remove.
6. Click Done to finish.

Alternatively, you can enable the Develop menu via the Advanced tab in Safari settings and use Develop > Empty Caches for a quicker method to clear cache only.

On iPhone or iPad:

1. Open the Settings app.
2. Scroll down to Apps , find and tap Safari.
3. Tap Clear History and Website Data.
4. Confirm by tapping Clear History and Data.

You can also clear just cookies and cache but keep history by going to Settings > Apps > Safari > Advanced > Website Data > Remove All Website Data. Clearing cache usually helps if a website is not loading properly or you want to clear storage and browsing data for privacy reasons.