(9). Use multiple browsers. One for research and sensitive work like online banking, another for shopping (Always use incognito mode while you searching and product on eCommerce), Do not let eCommerce companies or other trackers to know your search history.
(10). Do not use browser extension which offers you discount on products and provide you time to time product sell alert. These kind of extension can monitor your online behavior.
(11). Use incognito mode while searching on google.

(1). Avoid using Chrome. Because google is known for the biggest user data collector in Internet, Google using all of it's tools to collect personal data of users as much as possible. Then google use those data to make profile of user and people around them google make timeline of your every activity and use them to show you specifically target ads to you. You can use other browser which provide better privacy protection then chrome. Some of them is Mozila, Brave, duckduckgo, Tor