The answer, at its basis, is largely what I convey in a great majority of my books about search engine optimization and online marketing. It all boils down to one simple concept: add tremendous amounts of value to the world. The more value you add, the more successful you become. Essentially, you have to do the most amount of work (initially at least) for the least return. Not the other way around.

By now, you've likely seen all the "gurus" in your Facebook feed. Some of them are more popular than others. What you'll notice is that the ads you see that have the highest views and engagement are normally the most successful. Use a site like Similar Web to study those ads and see what they're doing. Join their lists and embed yourself in their funnels. That's an important part of the process so that you can replicate and reverse engineer what the most successful marketers are doing.
Marketing departments are the primary beneficiaries of SEM. By paying for certain keyword terms, they can drive inbound traffic to websites. SEM helps boost traffic by making products and services display more prominently given paid advertising. While website browsers may benefit from SEM by having products and services more easily brought to their attention, they also have to be on guard against website activity that is spurious or doesn’t address their needs.
Push notifications are messages or alerts delivered by your app to the user. These messages appear on the home screen of a user’s mobile device regardless of whether the user is engaged with the app or even has it open. For a push notification to work, the user needs to have already downloaded your app and agreed to allow push notifications. Luckily, 70% of mobile users allow push notifications.
Another reason is that if you're using an image as a link, the alt text for that image will be treated similarly to the anchor text of a text link. However, we don't recommend using too many images for links in your site's navigation when text links could serve the same purpose. Lastly, optimizing your image filenames and alt text makes it easier for image search projects like Google Image Search to better understand your images.