“She is also the recipient of numerous awards, including the Pulitzer Prize for Nonfiction.”

You are introducing a speaker at a conference. She is a well-known writer who has won awards. You're listing her accomplishments. You say one of the accomplishments on the list:

She is also the recipient of numerous awards, including the Pulitzer Prize for Nonfiction.

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“Next up is Steve. He's going to walk us through the new homepage redesign.”

You're in charge of a meeting at work. One of your coworkers is going to give a quick presentation for everyone. You introduce him by saying:

Next up is Steve. He's going to walk us through the new home page redesign.

Next up is (someone)

This phrase introduces the next person who's going to speak at a meeting, the next performer in a theater, or the next set of athletes who are going to compete in a sports tournament:

Next up is a man who needs no introduction. Ladies and gentlemen, put your hands together for Trey Faust!

Next up is the champion, Marla Needham, against newcomer Erin Spanner.

walk (someone) through (something)

When you "walk through" something, you talk about it step-by-step. In the example above, the speaker says that his coworker is going to walk everyone through a new home page. That means that he's going to show them each new feature of the site. Some other examples of "walking through" something include:

• When you're preparing for a wedding, you usually walk everyone through what to do during the ceremony.
• You should walk your children through what to do in case of an emergency like a fire.

a home page redesign

The "home page" of a website is the first page that you see when you visit that site.

A "web page redesign" is when someone changes how a web page looks or works.

“Over one in five Americans suffer from obesity.”

You're writing a blog post about how you think America should solve the problem of having too many overweight people. You're introducing the topic. You write:

Over one in five Americans suffer from obesity.

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“Let me tell you a bit about my background.”

You are giving a presentation at a conference. You are at the beginning of the presentation. You've said your name and thanked the person who introduced you. Now you want to tell the audience about yourself. You start by saying:

Let me tell you a bit about my background.

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“Tom is an expert on social media marketing.”

You organized a conference. You are introducing the first speaker. You have just said the speaker's name, and now you're going to give some information about him:

Tom is an expert on social media marketing.

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“So, I'd like to introduce our first speaker, Tom Johnson.”

You are the organizer of a conference. You are introducing the first speaker. You start by saying "thank you" to the audience for coming. Then, when you're ready for the speaker to begin, you say:

So, I'd like to introduce our first speaker, Tom Johnson.

So...

This is a good way to signal a new "part" of a conversation. In this example, it shows that the general comments about the event are finished and you are now going to start to introduce the speaker.

I'd like to (do something)

You use the phrase "I'd like to (do something)" mostly in speeches, or when you're talking with someone like a bank teller or a restaurant host. You don't often use it in face-to-face conversation between people.

You say "I'd like to ___" to let the listener know what your purpose is. For example:

I'd like to introduce our first speaker.

You say this before you introduce him.

I'd like to place an order for delivery.

You say this when you call to order food to be delivered from a restaurant.

introduce (someone)

When you "introduce" a person, you tell listeners who this person is.