I want to add a info message in service portal

[savanthsant]

i want to add event message in service portal for can you guide me how to add it 

[Ankur Bawiskar]

@savanthsant 

your requirement is not clear.

what message and where you want to add and when?

[yashkamde]

Hello @savanthsant ,

where you want to show the message ?

1) If you are in widget and need a dynamic pop-up event message, you can pass a string directly to the client controller using :

spUtil.addInfoMessage('Your Message');

2) If want to add an event message or broadcast alert in the Service Portal then you can use Announcement to display a banner :

Refer here : How to New message in servicenow portal Banner 

If my response helped mark as helpful and accept the solution.