This is often due to the graphics that are displayed on the site seeking the high quality of the posted photos. Because of the "heavy" images, the site takes a long time to load, and clients, without waiting for its final loading, simply close the window and go to competitors.
At the same time, Tilda makes it possible to post high-quality images on the site without losing the loading speed, which far from all the newbie programmers know about. Usability errors, leading to the refusal of users to familiarize themselves with the content of the site, seriously affect its promotion in search results and the ability to attract potential customers.