The big names in the web browser community, Apple, Google, Microsoft and Mozilla, are all dropping support for Transport Layer Security (TLS) 1.0 and 1.1 in March 2020. The protocol allowed for secure and encrypted connections to web servers for online forms and data transmission, but proved to have several security flaws. It has been superseded by TLS 1.2. Ars Technica noted the pending depreciation saying,
The impact of removing the old protocols shouldn’t be too substantial. All four companies cite usage figures for the old versions; Firefox sees the most TLS 1.0 and 1.1 usage (1.4 percent of all secure connections) while the other three vendors claim a figure below 1.0 percent. The current recommendation is that sites switch to TLS 1.2 (which happens to be the minimum required for HTTP 2.0) and offer only a limited, modern set of encryption algorithms and authentication schemes. TLS 1.3 was recently finalized, but it currently has little widespread adoption.
Odds are most people won’t notice the lack of TLS 1.0 and 1.1 support since the vast majority of sites have already moved on to version 1.2.