Security assurances
In the early days of eCommerce, a lack of familiarity with transacting online meant the security of sensitive information like credit card details was at the forefront of most people's minds. For this reason, it was common to see checkout buttons, for example, surrounded by security badges and statements about security.
These days, purchasing online is far more commonplace and customer anxieties around online payment are significantly reduced, particularly with the advent of third-party payment platforms like PayPal.
That said, anxiety around providing payment details online still exists. A 2023 study by research group The Baymard Institute found that 19% of shopping cart abandonment occurs due to customers not trusting a website with their credit card information.
For this reason, it is still important to address security, even in this day and age of a more online-savvy population.
You need only look to Amazon to see how important security is as a consideration. Despite arguably being the world's most trusted eCommerce platform, Amazon frequently references site security at multiple points of the transaction process, from sign-in to checkout.
As you can see from the Amazon example below, they don't go overboard and let their security markers get in the way of the shopping experience. Instead, they incorporate references to security at key interaction points, either making them a part of the call to action (such as with the account sign-in button) or presenting them close to critical calls to action, as seen with the add-to-cart panel.