How to add words/excerpts

Hello, my site is macexpertguide.com and using your theme. Can you please advised me on how to add the word snippet/excerpts that should be showing after the title on the homepage?
It’s usually the first few words f the article so people know what they are going to read. Thank you

I don’t know how to get to this part because my tagDiv Composer does not look like that.

I sent the screenshoots through main email, cannot add them here. I have another issue which I mentioned in the email.

I don’t think my email went through. I replied to the noreply email so I don’t think it’s got to you.
What’s the email that I can reply on?

Thanks