Peggy, while waiting on a specific answer, this may suffice.
If it's a webpage you're referring to, simply click on the URL field and copy. It will copy a link.
Then just paste the link in the message body
eg, here's a link to the 1966 Batman movie on IMDB:
https://www.imdb.com/title/tt0060153/
The reader can then just click on the link or copy n paste into a URL field