There are widget areas that can be viewed under the Appearance > one sidebar areas with 2 custom widgets (Author and Latest News).
This widget will show your social link that you had created before on theme options > Social Options.
Latest Post With Thumb
This widget will show your post with the thumbnail at the sidebar as a tab. First tab will show your latest news and second tab will show your popular news (sort by view or love count).
To use this theme you need to activate Mailchimp for WordPress plugin in require plugins. After that follow the instruction from Mailchimp to get API key. Then insert this HTML markup in Mailchimp > form:
<p class="newsletter-head">Get the best of MalabarNews delivered to your inbox daily</p>
<input type="email" name="EMAIL" placeholder="Your email address" required />
<input type="submit" value="Sign up" />
After make a form, go to appearance > widget > and drag the Newsletter widget into sidebar area to activate it.
Malabar Ads Widget (Advertisement)