* Use relevant and timely hashtags.

* Retweet and engage with other users who share your cause.

* Use Twitter polls to get feedback from your audience.

* Run Twitter contests or giveaways.

* Create and share impactful visual content.

* Use Twitter lists to organize and follow relevant users and organizations.

On Facebook:

* Create a Facebook page for your cause.

* Share interesting and engaging content that is relevant to your cause.

* Use Facebook Live to connect with your audience in real time.

* Run Facebook ads to reach a wider audience.

* Create a Facebook group for your supporters to connect with each other.

* Use Facebook Messenger to communicate with your supporters and answer their questions.

* Use Facebook Stories to share behind-the-scenes looks at your cause.

General Tips:

* Be authentic and genuine.

* Be respectful of other users' opinions.

* Be consistent in your messaging and branding.

* Use social media to listen to your audience and learn what they care about.

* Don't be afraid to ask for donations or support.

* Use social media to celebrate your successes and milestones.