Yes, hiring managers at Marriott may review your online activity as part of their background check process. It's important to maintain a professional online presence, particularly on professional networking platforms like LinkedIn. Consider optimizing your online profiles to highlight relevant skills and experience that align with the job you're applying for. Additionally, use privacy settings to control what potential employers can see on your personal social media accounts. For more job search advice, check out resources on Jobcase and other job search providers. Good luck!