First of all, make sure you’ve covered the basics.
Complete or update your bio, highlighting the personal or business traits you want to emphasize.
Add your personal or company website to your bio.
Consider updating your photo, especially if it’s outdated.
If you’ve updated logos or colors, you should also consider changing your header photo and/or your theme to reflect your fresh look.
Secondly, take a look at your posts, especially the recent ones.
Are there any that are inappropriate for your professional account?
If you publish something on the Internet, it lives forever, but you can delete anything you don’t want to draw attention to. Flippant comments or poorly executed jokes can have long-lasting consequences.
Finally, take a look at both the people you follow and your followers.
People you follow whom you may want to delete: Those who post about things that don’t interest you, those who never post, or those who live-tweet events or shows you aren’t interested in. You can consider muting them so their tweets don’t show up in your timeline, or you can stop following them.
For followers, are they real? Spammers can add fake accounts to your list of followers. Find out who’s fake, then delete or block those accounts.
Consider creating Twitter lists to organize friends or industry contacts.
You may also want to take a closer look at your app permissions. See which apps or sites you have given permission to access your profile and remove any that are no longer useful or relevant.
More people will see your headline than anything else, so make sure it’s well-written and contains quality keywords.
Replace or update your profile photo with an current professional headshot.
Work on your summary to highlight your most relevant experience and skills. Think of this as your elevator pitch.
Do you have a new title, new responsibilities or an expanded set of skills and experiences you should add or highlight?
Make sure your contact information is updated so clients and others can get in touch.
Personalize your profile’s URL with your name or business name.
Use keywords to make sure you’re coming up in relevant searches for people looking for someone like you. Don’t abuse keywords, but do include them in your Headline, Summary and Experience sections.
Ask happy customers and contacts for recommendations. A good word from a past customer is always helpful.
Next, take a good look at your connections. When you first joined LinkedIn, chances are you accepted most requests to connect. But once you’ve been on the platform for a while, it makes sense to be specific to your industry or your current and prospective clients.
Remove people from your network who aren’t helpful or positive. Spammers, people who constantly ask for help without returning the favor, etc.
Keep your network updated. Have you been to any conferences, meetings or other events where you’ve met interesting contacts? Add them to your connections.
Consider joining industry-relevant groups or leaving those that are no longer useful.