How can we use Append Data to a Field.

I had this issue. I had a Marketing Comments field that would continually get overwritten and I wanted to maintain the historical data for our SFDC records. I also wanted to include the date of the new information. To solve this I created a second field and used a trigger flow step and global tokens.

Fields used:

Original field: Marketing Comments

New field: Form Field Marketing Comments.

Flow steps: If "Data value change" is (form field marketing comments) then update (Marketing comments) to: {{system.date}} {{Lead.Form Field Marketing Comments}} | {{Lead. Marketing Comments}}

What this does is it keeps the original data in the field Marketing Comments with the lead token {{lead.Marketing Comments}} and appends the new information in the field Form Field Marketing Comments via the lead token {{lead.Form Field Marketing Comments}}. An example of the format of the updated field would look like:

   July 30, 2018 Requesting quote for ABC in quantity 123 | February 17, 2018 Please provide additional information for your widget | December 5, 2017 I would like to get lead time on item Y.

Does that make sense?

Please help me to understand more clearly, have confusion that how it will work

Use Change Data Value, include the current value as a token in the New Value box.

   My Field  → {{lead.My Field}} new data