After you sign up for a Twitter account, begin filling up your timeline with tweets from accounts you want to follow. To follow someone on Twitter, tap or click the Follow button on the user's tweets or profile page. How you go about locating the Follow button varies depending on whether you're using the official Twitter app for mobile devices or the Twitter website.
Follow Someone Using the Twitter Mobile App
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Follow Via the Person's Profile Page
Step 1
Tap the Search icon on the main menu at the top of the Twitter app. Enter the name of the person you want to follow and then tap that person's name on the list of search results to load the person's profile page.
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Step 2
Tap the Follow button on the profile page to begin following that person.
After you tap the Follow button, it turns blue and a check mark appears, indicating that you are now following the account. The Twitter app displays a list of related accounts you may also want to follow. Tap the Follow icon next to any of these suggested accounts to begin following them.
Follow Via a Tweet
Every tweet an account makes on Twitter provides access to a Follow button, which you can use to begin following that account.
Whether you're on your timeline or viewing retweets on another person's profile, if you're reading a tweet from a person you want to follow, tap the Follow button in the bottom-right corner of the tweet to begin following the account.
You can also tap the person's name at the top of the tweet to view the full tweet in a dedicated window, where a Follow button appears on the top-right corner.
Follow Someone Using the Twitter Website
As with the mobile app, click the Follow button wherever you see it to begin following the associated account. Use the Search tool to locate Twitter users you want to follow.
Follow Via the Person's Profile Page
Step 1
Click the Search field in the top-right corner of the Twitter website, enter the name of the account you want to follow and then select that account on the search results to view the user's profile page.
Step 2
Click the Follow button on the profile page to begin following that account.
Follow Via a Tweet
As with the Twitter mobile app, every tweet on the Twitter website provides access to a Follow button you can use to begin following the account that made the tweet.
Click the Follow button beneath the tweet to begin following the account.
You can also begin following someone by clicking her name on your timeline to load the account profile summary pop-up window, and clicking the Follow button in the upper-right corner.