Reference:Salesforce Documentation - AMPscript

When creating a data extension to store all attributes for a triggered send, selecting the 'Use for triggered send' checkbox is essential. This configuration ensuresthat the data extension is specifically set up to handle triggered sends, enabling it to capture and store the necessary subscriber information and attributes associated with those sends. This setting activates the data extension for use with triggered send activities.
Reference:Salesforce Marketing Cloud Documentation - Triggered Sends

Reference: Salesforce Marketing Cloud Documentation on Email Studio Overview and Send Management

In Salesforce Marketing Cloud, to update an email link's URL after the email has been sent, you should navigate to the Job Links tab in My Tracking. This allows you to modify the URLs of links in sent emails, ensuring thecorrect destination for your recipients even after the email is delivered.
Reference:Salesforce Marketing Cloud Documentation on Updating Sent Email Links

When the file delivery cadence changes to multiple times a day, it is efficient to replace the existing schedule- based automation with a File Drop automation. This setup triggers the automation whenever a file matching a specific filename pattern is dropped into the SFTP, thereby minimizing network usage and ensuring timely processing of the files as they are received.
Reference:Salesforce Marketing Cloud Documentation on File Drop Automations