Specify an action

Select New step, and then select Add an action.
In the box that shows Search all connectors and actions, type or paste send email, and then select Office 365 Outlook - Send an email.
If prompted, select the sign-in button, and then provide your credentials.
In the form that appears, type or paste your email address in the To box then select your name from the list of contacts that appears.
In the Subject box, type or paste New tweet from:, then type a space.
In the list of tokens, select the Tweeted by token to add a placeholder for it.
Select the Body box, and then select the Tweet text token to add a placeholder for it.
(optional) Add more tokens, other content, or both to the body of the email.
Near the top of the screen, name your flow, and then select Create flow.
Select Done to update the list of flows.
Send a tweet with the keyword that you indicated, or wait for someone else to post such a tweet.

Within a minute after the tweet is posted, an email message notifies you of the new tweet.

Source: Microsoft

(The provided example uses Twitter as an action)