Popular tools for online marketing

Google Analytics: for tracking and analyzing website traffic and user behavior.
Email marketing platforms such as Mailchimp or Constant Contact, for creating and sending mass email campaigns.
Social media management tools like Hootsuite or Buffer, for scheduling and publishing social media posts.
SEO (Search Engine Optimization) tools like Ahrefs or Moz, for improving the visibility and ranking of a website in search engines.
Content marketing tools like SEMrush or Buzzsumo, for creating and promoting content, and analyzing its performance.
Pay-per-click advertising platforms like Google Ads or Facebook Ads, for running online advertisements.
Landing page builders like Leadpages or Unbounce, for creating conversion-optimized landing pages.
A/B testing tools like Optimizely or VWO, for testing different variations of a website or marketing campaign to determine what works best.

These are just a few examples, there are many other tools available depending on the specific needs and goals of a marketing campaign.