There are several ways to share images.
Send a share link via email
Copy a share link
A shared project is ideal for professional collaboration. You decide exactly which permissions your client should have.
For example, you can determine whether they are allowed to download images or not. You can configure these settings granularly.
Share settings can be assigned differently for each generated link. This means you can create a link with full access for a colleague working on the project, and a "View Only" link for the client.
To change the share settings of a shared link, go to shares.
Click on Edit in the 3-dot menu. This opens the share dialog where you can make the desired adjustments.