The growth of E-Commerce in the Philippines has shifted dramatically at an unprecedented pace during the COVID-19 pandemic, forcing consumers to shop online. The change in consumer behavior created a domino effect both for physical stores and e-commerce platforms. With the impact on the said area, the study focused on Shopee’s big online shopping events that make the platform the #1 Online Shopping Application in the Philippines as of 2020. The study empirically observed and analyzed how the factors influenced users to participate and develop their purchase intentions, considering the ongoing pandemic, allowing the researchers to identify the gaps in an online event. The factors that were observed are Celebrity Endorsers & Social Media Influencers, Advertising Appeal, Creative Sales Promotion/s, and Timing. The study used an online survey questionnaire, allowing the researchers to gather quantitative data through Likert Scale questions or statements that asked the respondents to answer based on their level of agreement. The effectiveness of each factor and its influence on purchase intention were determined by performing Descriptive Statistics and Regression Analysis as it was revealed that creative sales promotions (offering free vouchers, providing promotional codes, discount deals, etc.) to consumers and timing of events have a significant effect on Shopee users’ purchase intention, which are ideal for marketers to use as tools to develop effective marketing strategies to attract and persuade consumers to purchase products. However, Celebrity Endorsers & Social Media Influencers and Advertising Appeal are not significant or have no influence on online shoppers’ intention to purchase. As these may not be the ideal marketing tools or strategies to persuade consumers to buy, these can be relevant when it comes to building brand image and increasing brand awareness. The findings provided online businesses with insights to influence users’ purchase intent during online shopping event sales.